{"id":3009,"date":"2021-12-28T14:10:51","date_gmt":"2021-12-28T08:40:51","guid":{"rendered":"https:\/\/infinitylearn.com\/surge\/?p=3009"},"modified":"2025-07-31T17:02:11","modified_gmt":"2025-07-31T11:32:11","slug":"class-9-science-chapter-1-ncert-solutions-free-pdf-download","status":"publish","type":"post","link":"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/","title":{"rendered":"NCERT Solutions for Class 9 Science Chapter 1 Matter in our Surroundings"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_37 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><label for=\"item\" aria-label=\"Table of Content\"><span style=\"display: flex;align-items: center;width: 35px;height: 30px;justify-content: center;\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/label><input type=\"checkbox\" id=\"item\"><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' style='display:block'><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/#What_is_Matter\" title=\"What is Matter?\">What is Matter?<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/#Matter_Definition\" title=\"Matter Definition\">Matter Definition<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/#Characteristics_of_Particles_of_Matter\" title=\"Characteristics of Particles of Matter\">Characteristics of Particles of Matter<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/#States_of_Matter\" title=\"States of Matter\">States of Matter<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/#Solid_Liquid_Gas\" title=\"Solid, Liquid, Gas\">Solid, Liquid, Gas<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/#Plasma_and_Bose-Einstein_Condensate_Optional_for_completeness\" title=\"Plasma and Bose-Einstein Condensate (Optional for completeness)\">Plasma and Bose-Einstein Condensate (Optional for completeness)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/#NCERT_Solutions_Class_9_Science_Chapter_1_PDF_Download\" title=\"NCERT Solutions Class 9 Science Chapter 1 PDF Download\">NCERT Solutions Class 9 Science Chapter 1 PDF Download<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/#Properties_and_Characteristics_of_Matter\" title=\"Properties and Characteristics of Matter\">Properties and Characteristics of Matter<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/#Volume_Mass_Density\" title=\"Volume, Mass, Density\">Volume, Mass, Density<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/#Compressibility_Diffusion\" title=\"Compressibility &amp; Diffusion\">Compressibility &amp; Diffusion<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/#Interconversion_of_States_of_Matter\" title=\"Interconversion of States of Matter\">Interconversion of States of Matter<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/#Melting_Freezing_Condensation_Boiling_Sublimation\" title=\"Melting, Freezing, Condensation, Boiling, Sublimation\">Melting, Freezing, Condensation, Boiling, Sublimation<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/#Latent_Heat_Effect_of_Temperature_and_Pressure\" title=\"Latent Heat &amp; Effect of Temperature and Pressure\">Latent Heat &amp; Effect of Temperature and Pressure<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/#Evaporation_and_Factors_Affecting_It\" title=\"Evaporation and Factors Affecting It\">Evaporation and Factors Affecting It<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/#Surface_Area_Wind_Speed_Temperature_Humidity\" title=\"Surface Area, Wind Speed, Temperature, Humidity\">Surface Area, Wind Speed, Temperature, Humidity<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/#Practical_Examples_Sweating_Cooling_of_Water_in_Earthen_Pot\" title=\"Practical Examples (Sweating, Cooling of Water in Earthen Pot)\">Practical Examples (Sweating, Cooling of Water in Earthen Pot)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/#NCERT_Solutions_Class_9_Science_Chapter_1_Important_NCERT_Textual_Questions\" title=\"NCERT Solutions Class 9 Science Chapter 1 Important NCERT Textual Questions\">NCERT Solutions Class 9 Science Chapter 1 Important NCERT Textual Questions<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/#Class_9_Science_Chapter_1_NCERT_Textual_Exercises\" title=\"Class 9 Science Chapter 1 NCERT Textual Exercises\">Class 9 Science Chapter 1 NCERT Textual Exercises<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/#Class_9_Science_Chapter_1_Topic_Notes\" title=\"Class 9 Science Chapter 1 Topic Notes\">Class 9 Science Chapter 1 Topic Notes<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/#Key_Features_of_NCERT_Solutions_for_Class_9_Science_Chapter_1\" title=\"Key Features of NCERT Solutions for Class 9 Science Chapter 1\">Key Features of NCERT Solutions for Class 9 Science Chapter 1<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/#NCERT_Solutions_for_Class_9_Science_Chapter_1-_FAQs\" title=\"NCERT Solutions for Class 9 Science Chapter 1- FAQ&#8217;s\">NCERT Solutions for Class 9 Science Chapter 1- FAQ&#8217;s<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/#Explain_the_various_state_of_matter_properties_discussed_in_Chapter_1_of_NCERT_Solutions_for_Class_9_Science\" title=\"Explain the various state of matter properties discussed in Chapter 1 of NCERT Solutions for Class 9 Science.\">Explain the various state of matter properties discussed in Chapter 1 of NCERT Solutions for Class 9 Science.<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/#In_each_exercise_of_NCERT_Solutions_for_Class_9_Science_Chapter_1_how_many_questions_are_there\" title=\"In each exercise of NCERT Solutions for Class 9 Science Chapter 1, how many questions are there? \">In each exercise of NCERT Solutions for Class 9 Science Chapter 1, how many questions are there? <\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/#Is_NCERT_Solutions_of_Chapter_1_for_Class_9_Science_adequate_for_test_preparation\" title=\"Is NCERT Solutions of Chapter 1 for Class 9 Science adequate for test preparation? \">Is NCERT Solutions of Chapter 1 for Class 9 Science adequate for test preparation? <\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/#What_is_the_main_topic_covered_in_Class_9_Chapter_1_of_the_matter\" title=\"What is the main topic covered in Class 9 Chapter 1 of the matter?\">What is the main topic covered in Class 9 Chapter 1 of the matter?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<p><strong><span class=\"___SText_lyret-ko_\" data-ui-name=\"Link.Text\">Class 9 Science Chapter 1<\/span>:<\/strong> This chapter has been withdrawn from the Revised Term-wise <a href=\"https:\/\/infinitylearn.com\/surge\/cbse\/cbse-syllabus\/\"><strong>CBSE Syllabus<\/strong><\/a> 2025-26.<\/p>\n<p>From the perspective of your CBSE Class 9 Science examination, NCERT Solutions for Class 9 Science (Chemistry) Chapter 1 Matter in Our Surroundings is important study material. The detailed NCERT Solutions for Class 9 Chemistry to all of the exercise questions offered here will aid in your understanding of the chapter&#8217;s core ideas.<\/p>\n<p>The matter is a fundamental idea in science, and it serves as the foundation for subjects covered in the following classes. NCERT Solutions for Class 9 Science (Chemistry) Chapter 1 \u2013 Matter in Our Surroundings might help you learn more. Solutions are created with the assistance of qualified teachers with extensive conceptual knowledge and years of expertise. The content is well-structured to make learning and understanding easy for pupils. In addition, the <a href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/\"><strong>NCERT Solutions<\/strong> <\/a>have been revised to reflect the most recent NCERT syllabus.<\/p>\n<p>We also make certain that the <strong><a href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/\">NCERT Solutions for Class 9 Science<\/a><\/strong> we supply are tailored to suit a variety of evaluator criteria. This ensures that the responses are extremely relevant and maintain their informational value across courses.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone wp-image-719375 size-full\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/NCERT-Solutions-for-Class-9-Science-Chapter-1-Matter-in-our-surroundings-copy-1.jpg\" alt=\"NCERT Solutions for Class 9 Science Chapter 1 Matter in our surroundings \" width=\"1024\" height=\"640\" srcset=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/NCERT-Solutions-for-Class-9-Science-Chapter-1-Matter-in-our-surroundings-copy-1.jpg 1024w, https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/NCERT-Solutions-for-Class-9-Science-Chapter-1-Matter-in-our-surroundings-copy-1-300x188.jpg 300w, https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/NCERT-Solutions-for-Class-9-Science-Chapter-1-Matter-in-our-surroundings-copy-1-768x480.jpg 768w, https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/NCERT-Solutions-for-Class-9-Science-Chapter-1-Matter-in-our-surroundings-copy-1-150x94.jpg 150w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<p>Everything you see around you \u2013 from the air you breathe to the food you eat, the clothes you wear, and even the stars in the night sky \u2013 is made up of matter. Understanding matter is fundamental to comprehending the world we live in. In this comprehensive guide, we&#8217;ll delve into the fascinating world of matter, exploring its definition, nature, different states, properties, and how it changes from one form to another. This article is designed to be your ultimate resource for mastering the concepts of matter in our surroundings, making it ideal for students preparing for exams and anyone curious about the building blocks of the universe.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_is_Matter\"><\/span>What is Matter?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Matter_Definition\"><\/span>Matter Definition<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>At its core, matter is anything that occupies space and has mass. This simple definition encompasses everything from the smallest atom to the largest galaxy. The physical nature of matter is particulate, meaning it&#8217;s composed of tiny, discrete particles rather than being continuous. Imagine a drop of water; it might seem continuous, but under a powerful microscope, you&#8217;d see countless individual water molecules.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Characteristics_of_Particles_of_Matter\"><\/span>Characteristics of Particles of Matter<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The particles that make up matter exhibit several key characteristics:<\/p>\n<ul>\n<li><strong>They are continuously moving:<\/strong> Even in what appears to be a stationary object, the particles are constantly vibrating, rotating, and translating. This inherent motion is why gases diffuse quickly and liquids flow.<\/li>\n<li><strong>They have space between them:<\/strong> The amount of space varies significantly between different states of matter. Solids have very little space, while gases have vast amounts.<\/li>\n<li><strong>They attract each other:<\/strong> Particles of matter are held together by forces of attraction. The strength of these forces determines many of matter&#8217;s properties, such as its rigidity or fluidity.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"States_of_Matter\"><\/span>States of Matter<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Matter exists in different forms, commonly known as states. These states are primarily determined by the arrangement and energy of their constituent particles.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Solid_Liquid_Gas\"><\/span>Solid, Liquid, Gas<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ol>\n<li><strong>Solids:<\/strong> Have a definite shape and a definite volume. Their particles are tightly packed and vibrate in fixed positions. Examples include ice, wood, and rock.<\/li>\n<li><strong>Liquids:<\/strong> Have a definite volume but no definite shape. They take the shape of their container. Their particles are less tightly packed than solids and can slide past each other. Examples include water, oil, and milk.<\/li>\n<li><strong>Gases:<\/strong> Have neither a definite shape nor a definite volume. They completely fill the container they are in. Their particles are far apart and move randomly and rapidly. Examples include air, oxygen, and nitrogen.<\/li>\n<\/ol>\n<h3><span class=\"ez-toc-section\" id=\"Plasma_and_Bose-Einstein_Condensate_Optional_for_completeness\"><\/span>Plasma and Bose-Einstein Condensate (Optional for completeness)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>While solids, liquids, and gases are the most common states of matter on Earth, two other states are worth mentioning for their unique properties:<\/p>\n<ul>\n<li><strong>Plasma:<\/strong> Often referred to as the &#8220;fourth state of matter,&#8221; plasma is an ionized gas where atoms have lost or gained electrons, resulting in a mixture of ions and free electrons. It&#8217;s the most abundant state of matter in the universe, found in stars, lightning, and neon signs.<\/li>\n<li><strong>Bose-Einstein Condensate (BEC):<\/strong> This state of matter occurs at extremely low temperatures, near absolute zero. In a BEC, a group of bosons is cooled to such a low temperature that their individual identities become indistinguishable, behaving as a single quantum entity. This exotic state has potential applications in quantum computing and precision measurements.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"NCERT_Solutions_Class_9_Science_Chapter_1_PDF_Download\"><\/span>NCERT Solutions Class 9 Science Chapter 1 PDF Download<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\t\t<div class=\"download-pdf-container\">\n\t\t\t<span class=\"title\">Do you need help with your Homework? 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class=\"otp_message\"><\/div>\n<p><label>Preferred time slot for the call<\/label><br \/>\n<span class=\"wpcf7-form-control-wrap timeslot\"><select name=\"timeslot\" class=\"wpcf7-form-control wpcf7-select\" aria-invalid=\"false\"><option value=\"\">---<\/option><option value=\"9 am\">9 am<\/option><option value=\"10 am\">10 am<\/option><option value=\"11 am\">11 am<\/option><option value=\"12 pm\">12 pm<\/option><option value=\"1 pm\">1 pm<\/option><option value=\"2 pm\">2 pm<\/option><option value=\"3 pm\">3 pm<\/option><option value=\"4 pm\">4 pm<\/option><option value=\"5 pm\">5 pm<\/option><option value=\"6 pm\">6 pm<\/option><option value=\"7 pm\">7 pm<\/option><option value=\"8pm\">8pm<\/option><option value=\"9 pm\">9 pm<\/option><option value=\"10pm\">10pm<\/option><\/select><\/span><\/p>\n<p><label>Please indicate your interest<\/label><br \/>\n<span class=\"wpcf7-form-control-wrap intent-checkbox\"><span class=\"wpcf7-form-control wpcf7-checkbox\"><span 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value=\"Hindi\">Hindi<\/option><option value=\"Marathi\">Marathi<\/option><option value=\"Tamil\">Tamil<\/option><option value=\"Telugu\">Telugu<\/option><option value=\"Malayalam\">Malayalam<\/option><\/select><\/span><\/p>\n<p><label>Are you a Sri Chaitanya student?<\/label><br \/>\n<span class=\"wpcf7-form-control-wrap sri-chaitanya-student\"><select name=\"sri-chaitanya-student\" class=\"wpcf7-form-control wpcf7-select\" aria-invalid=\"false\"><option value=\"No\">No<\/option><option value=\"Yes\">Yes<\/option><\/select><\/span><\/p>\n<style>\n.intent-checkbox .wpcf7-checkbox{\n    display: flex;\n    flex-wrap: wrap;\n}\n.intent-checkbox .wpcf7-checkbox .wpcf7-list-item {\n    width: 50%;\n    margin: 0!important;\n    padding: 0.1rem;\n}\n<\/style>\n<p class=\"verify_otp_input\">Verify OTP Code (required)<br \/><span class=\"wpcf7-form-control-wrap phone_verify\"><input type=\"number\" name=\"phone_verify\" value=\"\" class=\"wpcf7-form-control wpcf7-number wpcf7-validates-as-required wpcf7-validates-as-number\" aria-required=\"true\" aria-invalid=\"false\" \/><\/span><\/p>\n<p><span style=\"display:none;\"><span class=\"wpcf7-form-control-wrap current-page-url\"><input type=\"text\" name=\"current-page-url\" value=\"https:\/\/_:443\/surge\/wp-json\/wp\/v2\/posts\/3009\" size=\"40\" class=\"wpcf7-form-control wpcf7dtx-dynamictext wpcf7-dynamictext\" aria-invalid=\"false\" \/><\/span><\/span><\/p>\n<style>.wpcf7-list-item{margin: 0 0.5em 0 0!important;}<\/style>\n<p class=\"title\" style=\"color: #6e6e6e;font-size:14px;font-weight:400;text-decoration: un;\"><span class=\"wpcf7-form-control-wrap acceptance-agreement\"><span class=\"wpcf7-form-control wpcf7-acceptance\"><span class=\"wpcf7-list-item\"><input type=\"checkbox\" name=\"acceptance-agreement\" value=\"1\" aria-invalid=\"false\" checked=\"checked\" \/><\/span><\/span><\/span> I agree to the <a target=\"_blank\" href=\"https:\/\/infinitylearn.com\/terms\" style=\"text-decoration: underline;\">terms and conditions<\/a> and <a target=\"_blank\" href=\"https:\/\/infinitylearn.com\/privacy\" style=\"text-decoration: underline;\">privacy policy<\/a>.<\/p>\n<p><input type=\"button\" style=\"cursor:pointer;width:auto;\" class=\"il_otp_submit\" value=\"Get OTP\" onclick=\"sendCF7OTP(this, otp_phone.value, user_name.value)\"><\/p>\n<div class=\"form-submit-btn-div\" style=\"display:none;\">\n<input type=\"submit\" value=\"Download PDF\" class=\"wpcf7-form-control has-spinner wpcf7-submit download-pdf-submit\" \/>\n<\/div>\n<\/div>\n<div class=\"wpcf7-response-output\" aria-hidden=\"true\"><\/div><\/form><\/div>\n\t\t\t\t\t<span class=\"pdf-link hidden\" data-pdf=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/securepdfs\/2022\/05\/MATTER-IN-OUR-SURROUNDINGS.pdf\"><\/span>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t<div class=\"bg-overlay\"><\/div>\n\t\t<\/div>\n\t\t<a href=\"\/surge\/?pdfemb-serveurl=https%3A%2F%2Finfinitylearn.com%2Fsurge%2Fwp-content%2Fuploads%2Fsecurepdfs%2F2022%2F05%2FMATTER-IN-OUR-SURROUNDINGS.pdf\" class=\"pdfemb-viewer\" style=\"\" data-width=\"max\" data-height=\"max\" data-mobile-width=\"0\"  data-scrollbar=\"both\" data-download=\"off\" data-tracking=\"on\" data-newwindow=\"on\" data-pagetextbox=\"off\" data-scrolltotop=\"on\" data-startzoom=\"100\" data-startfpzoom=\"100\" data-download-nonce=\"43130743dd\" data-disablerightclick=\"on\" data-toolbar=\"top\" data-toolbar-fixed=\"on\">MATTER IN OUR SURROUNDINGS<br\/><\/a>\n<p><strong>NCERT Solutions for Class 9 All Subjects<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/maths\/\"><strong>NCERT Solutions for Class 9 Maths<\/strong><\/a><\/li>\n<li><strong><a href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/\">NCERT Solutions for Class 9 Science<\/a><\/strong><\/li>\n<li><strong><a href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/social-science\/\">NCERT Solutions for Class 9 Social Science<\/a><\/strong><\/li>\n<li><strong><a href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/english\/\">NCERT Solutions for Class 9 English<\/a><\/strong><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Properties_and_Characteristics_of_Matter\"><\/span>Properties and Characteristics of Matter<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Beyond its states, matter possesses several measurable properties that help us understand and classify it.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Volume_Mass_Density\"><\/span>Volume, Mass, Density<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>Volume: The amount of space an object occupies. It is typically measured in cubic meters (m3) or liters (L).<\/li>\n<li>Mass: The amount of matter contained in an object. It is a fundamental property and is typically measured in kilograms (kg) or grams (g). Unlike weight, mass does not change with gravity.<\/li>\n<li>Density: A measure of how much mass is contained in a given volume. It is calculated as mass divided by volume (rho=fracmV). Density is a crucial property for understanding buoyancy and material properties.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Compressibility_Diffusion\"><\/span>Compressibility &amp; Diffusion<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>Compressibility: The ability of a substance to be squeezed into a smaller volume. Gases are highly compressible due to the large spaces between their particles, while liquids are very slightly compressible, and solids are practically incompressible.<\/li>\n<li>Diffusion: The intermixing of particles of two different types of matter on their own. This phenomenon is a direct consequence of the continuous motion of particles. For example, the smell of an incense stick spreads throughout a room due to diffusion.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Interconversion_of_States_of_Matter\"><\/span>Interconversion of States of Matter<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Matter can change from one state to another by altering temperature and pressure. These changes are physical changes, meaning the chemical composition of the matter remains the same.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Melting_Freezing_Condensation_Boiling_Sublimation\"><\/span>Melting, Freezing, Condensation, Boiling, Sublimation<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li><strong>Melting (Fusion):<\/strong> The process by which a solid changes into a liquid upon heating (e.g., ice melting into water).<\/li>\n<li><strong>Freezing (Solidification):<\/strong> The process by which a liquid changes into a solid upon cooling (e.g., water freezing into ice).<\/li>\n<li><strong>Boiling (Vaporization):<\/strong> The process by which a liquid rapidly changes into a gas at a specific temperature (its boiling point), forming bubbles throughout the liquid (e.g., water boiling into steam).<\/li>\n<li><strong>Condensation:<\/strong> The process by which a gas changes into a liquid upon cooling (e.g., water vapor forming clouds).<\/li>\n<li><strong>Sublimation:<\/strong> The direct change of a solid into a gas, or a gas into a solid, without passing through the liquid state (e.g., dry ice (solid carbon dioxide) turning directly into gaseous carbon dioxide).<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Latent_Heat_Effect_of_Temperature_and_Pressure\"><\/span>Latent Heat &amp; Effect of Temperature and Pressure<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>Latent Heat: The &#8220;hidden&#8221; heat energy absorbed or released during a change of state at a constant temperature.\n<ul>\n<li>Latent Heat of Fusion: The energy required to change 1 kg of a solid into a liquid at its melting point.<\/li>\n<li>Latent Heat of Vaporization: The energy required to change 1 kg of a liquid into a gas at its boiling point.<\/li>\n<\/ul>\n<\/li>\n<li>Effect of Temperature and Pressure:\n<ul>\n<li>Temperature: Increasing temperature generally causes matter to move towards states with higher particle energy (solid right arrow liquid right arrow gas). Decreasing temperature causes the opposite.<\/li>\n<li>Pressure: Increasing pressure generally favors states with closer particle packing (gas right arrow liquid right arrow solid). Decreasing pressure favors states with more spread-out particles.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Evaporation_and_Factors_Affecting_It\"><\/span>Evaporation and Factors Affecting It<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Evaporation is a surface phenomenon where liquid changes into vapor at any temperature below its boiling point. Unlike boiling, evaporation occurs only from the surface of the liquid.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Surface_Area_Wind_Speed_Temperature_Humidity\"><\/span>Surface Area, Wind Speed, Temperature, Humidity<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Several factors influence the rate of evaporation:<\/p>\n<ul>\n<li>Surface Area: A larger surface area exposed to the air allows more particles to escape, increasing the rate of evaporation. (e.g., clothes dry faster when spread out).<\/li>\n<li>Wind Speed: Increased wind speed carries away water vapor, preventing it from returning to the liquid state and thus increasing evaporation. (e.g., clothes dry faster on a windy day).<\/li>\n<li>Temperature: Higher temperatures provide more kinetic energy to liquid particles, enabling more of them to escape into the vapor phase, increasing evaporation. (e.g., water evaporates faster in the sun).<\/li>\n<li>Humidity: Humidity refers to the amount of water vapor present in the air. High humidity means the air already contains a significant amount of water vapor, reducing the rate at which more water can evaporate into it. (e.g., clothes dry slower on a humid day).<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Practical_Examples_Sweating_Cooling_of_Water_in_Earthen_Pot\"><\/span>Practical Examples (Sweating, Cooling of Water in Earthen Pot)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>Sweating: When we sweat, the water on our skin evaporates. This process absorbs latent heat from our body, leading to a cooling sensation.<\/li>\n<li>Cooling of Water in an Earthen Pot: Earthen pots are porous, allowing some water to seep to the surface. This water then evaporates, taking latent heat from the remaining water inside the pot, thus cooling it.<\/li>\n<\/ul>\n<table>\n<tbody>\n<tr>\n<td>Property \/ State<\/td>\n<td>Solid<\/td>\n<td>Liquid<\/td>\n<td>Gas<\/td>\n<\/tr>\n<tr>\n<td>Shape<\/td>\n<td>Definite<\/td>\n<td>No definite (takes container&#8217;s shape)<\/td>\n<td>No definite (fills container)<\/td>\n<\/tr>\n<tr>\n<td>Volume<\/td>\n<td>Definite<\/td>\n<td>Definite<\/td>\n<td>No definite<\/td>\n<\/tr>\n<tr>\n<td>Compressibility<\/td>\n<td>Negligible<\/td>\n<td>Very low<\/td>\n<td>High<\/td>\n<\/tr>\n<tr>\n<td>Interparticle Space<\/td>\n<td>Very little<\/td>\n<td>More than solids, less than gases<\/td>\n<td>Very large<\/td>\n<\/tr>\n<tr>\n<td>Interparticle Force<\/td>\n<td>Strong<\/td>\n<td>Moderate<\/td>\n<td>Weak<\/td>\n<\/tr>\n<tr>\n<td>Rigidity\/Fluidity<\/td>\n<td>Rigid<\/td>\n<td>Fluid<\/td>\n<td>Fluid<\/td>\n<\/tr>\n<tr>\n<td>Diffusion<\/td>\n<td>Extremely slow (negligible)<\/td>\n<td>Slower than gases, faster than solids<\/td>\n<td>Very fast<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><span class=\"ez-toc-section\" id=\"NCERT_Solutions_Class_9_Science_Chapter_1_Important_NCERT_Textual_Questions\"><\/span>NCERT Solutions Class 9 Science Chapter 1 Important NCERT Textual Questions<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>1. Convert the following temperatures to the Celsius scale.<\/strong><\/p>\n<p>a) 293 K b) 470 K<\/p>\n<p>A. Temperature on kelvin Scale = Temperature on Celsius scale + 273<\/p>\n<p>a) 293 K = Temperature on Celsius scale + 273.<\/p>\n<p>Temperature on Celsius scale = 293 \u2013 273 = 20\u00baC<\/p>\n<p>b) 470 K = Temperature on Celsius scale + 273.<\/p>\n<p>Temperature on Celsius scale = 470 \u2013 273 =197\u00baC<\/p>\n<p><strong>2. Convert the following temperature to the kelvin scale.<\/strong><\/p>\n<p>a) 25\u00baC                                                          b) 373\u00baC<\/p>\n<p>A. a) Temperature on kelvin scale = Temperature on Celsius scale + 273 = 25 + 273 = 298 K<\/p>\n<p>b) Temperature on kelvin scale = 373 + 273 = 646 K<\/p>\n<p><strong>3. Give reason for the following observations.            <\/strong><\/p>\n<p>a. Naphthalene balls disappear with time without leaving any solid.<\/p>\n<p>A. Naphthalene balls can sublime. Therefore, it changes into vapors completely, which disappear into the air and no solid is left. It is also called as sublimation.<\/p>\n<p>b. Can we get the smell of perfume sitting several meters away.<\/p>\n<p>A. Yes! it is because perfumes contain volatile solvent, which carries pleasant smelling vapors. They diffuse quite fast and can reach to people sitting several meters away.<\/p>\n<p><strong>4. Arrange the following substances in increasing order of forces of attraction between the particles of water, sugar, Oxygen.<\/strong><\/p>\n<p>A. The increasing order of inter molecular forces of attraction: Gas &lt; Liquid &lt; Solid<\/p>\n<p>as well as, Oxygen &lt; water &lt; Sugar.<\/p>\n<p><strong>5. What is the physical state of water at.         <\/strong><\/p>\n<p>a) 25\u00baC            b) 0\u00baC                            c) 100\u00baC<\/p>\n<p>A. a) Physical state of water at 25\u00baC is Liquid<\/p>\n<p>b) Physical state of water at 0\u00ba C is liquid (or) solid<\/p>\n<p>c) Physical state of water at 100\u00baC is liquid (or) gas<\/p>\n<p>Note: An equilibrium will be existing between liquid and solid (or) liquid and gas<\/p>\n<p><strong>6. Give two reasons to justify:            <\/strong><\/p>\n<p>a. Water at room temperature is a liquid<\/p>\n<p>A. Water at room temperature is a liquid because<\/p>\n<p>i)         Water has a definite volume and has no definite shape. It acquires the shape of the containers.<\/p>\n<p>ii)        It has one free surface<\/p>\n<p>iii)       It can be flow<\/p>\n<p>b. An iron almirah is a solid at room temperature.<\/p>\n<p>A. i) Iron almirah is rigid and cannot be compressed<\/p>\n<p>ii) It has definite shape and volume<\/p>\n<p><strong>7. Why is ice at 273 K more effective in cooling than water at the same temperature.<\/strong><\/p>\n<p>A. Cooling takes place, when heat is removed from a system.<\/p>\n<p>In the case of ice at 273K, it will take latent heat from the medium to convert itself into water at 273 K, and then into water at higher temperature. Ice at 273 K, there will be change in physical state, where as in case of water at 273 K, there will be no change in state. So, particles in water at 273 K, have more energy compared to particles in ice at the same temperature.<\/p>\n<p><strong>8. What produces more severe burns, boiling water (or) steam?<\/strong><\/p>\n<p>A. Steam will produce more severe burns at 100\u00baC, than boiling water at the same temperature (100\u00baC)<\/p>\n<p><strong>9. Name A, B, C, D, E and F in the following diagram showing change in its state. <\/strong><\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-medium wp-image-57641\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/Change-of-state-flow-300x231.png\" alt=\"\" width=\"300\" height=\"231\" srcset=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/Change-of-state-flow-300x231.png?v=1643030736 300w, https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/Change-of-state-flow.png?v=1643030736 305w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>A = Fusion (or) Melting                                       D = Solidification (or) Freezing<\/p>\n<p>B = Vaporization (or) boiling                               E = Sublimation<\/p>\n<p>C = Condensation (or) liquification                     F = Deposition<\/p>\n<div class=\"table-responsive\">\n<table class=\"table table-bordered table-striped\" style=\"width: 66.5777%; height: 96px;\" cellspacing=\"0\" cellpadding=\"5\">\n<tbody>\n<tr style=\"background-color: #89cff0; color: black;\">\n<td style=\"text-align: center; width: 108.127%; height: 24px;\" colspan=\"2\" align=\"left\"><strong>CBSE Syllabus for Class 9<\/strong><\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 44.3522%; height: 24px;\" align=\"left\"><a href=\"https:\/\/infinitylearn.com\/surge\/cbse\/cbse-class-9-science-syllabus\/\" target=\"_blank\" rel=\"noopener\"><strong>CBSE Class 9 Science Syllabus<\/strong><\/a><\/td>\n<td style=\"width: 63.7748%; text-align: left; height: 24px;\" align=\"right\"><a href=\"https:\/\/infinitylearn.com\/surge\/cbse\/cbse-class-9-information-technology-syllabus\/\"><strong>CBSE Class 9 Information Technology Syllabus<\/strong><\/a><\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 44.3522%; height: 24px;\" align=\"left\"><a href=\"https:\/\/infinitylearn.com\/surge\/cbse\/cbse-class-9-social-science-syllabus\/\" target=\"_blank\" rel=\"noopener\"><strong>CBSE Class 9 Social Science Syllabus<\/strong><\/a><\/td>\n<td style=\"width: 63.7748%; text-align: left; height: 24px;\" align=\"right\"><a href=\"https:\/\/infinitylearn.com\/surge\/cbse\/cbse-class-9-maths-syllabus\/\"><strong>CBSE Class 9 Maths Syllabus<\/strong><\/a><\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 44.3522%; height: 24px;\" align=\"left\"><a href=\"https:\/\/infinitylearn.com\/surge\/cbse\/cbse-class-9-hindi-syllabus\/\"><strong>CBSE Class 9 Hindi Syllabus<\/strong><\/a><\/td>\n<td style=\"width: 63.7748%; text-align: left; height: 24px;\" align=\"right\"><a href=\"https:\/\/infinitylearn.com\/surge\/cbse\/cbse-class-9-english-syllabus\/\" target=\"_blank\" rel=\"noopener\"><strong>CBSE Class 9 English Syllabus<\/strong><\/a><\/td>\n<\/tr>\n<tr style=\"height: 24px;\">\n<td style=\"width: 44.3522%; height: 24px;\" align=\"left\"><a href=\"https:\/\/infinitylearn.com\/surge\/cbse\/cbse-class-9-artificial-intelligence-syllabus\/\" target=\"_blank\" rel=\"noopener\"><strong>CBSE Class 9 AI Syllabus <\/strong><\/a><\/td>\n<td style=\"width: 63.7748%; text-align: left; height: 24px;\" align=\"right\"><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3><span class=\"ez-toc-section\" id=\"Class_9_Science_Chapter_1_NCERT_Textual_Exercises\"><\/span>Class 9 Science Chapter 1 NCERT Textual Exercises<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>1. Which of the following are matter? Chair, air, live, smell, hate, almonds, thought, cold, cold drink, smell of perfume. <\/strong><\/p>\n<p>A. Chair, air, almonds, cold drink.<\/p>\n<p><strong>2. Give reasons for the following observation. The smell of hot sizzling food reaches you several meters away, but to get the smell from cold food you have to go close. <\/strong><\/p>\n<p>A. The rate of diffusion is faster at higher temperature than at lower temperature. The rate of diffusion of hot sizzling food is more and therefore, reaches us even several meters away. On the other hand, rate of diffusion of cold food is less and therefore, we have to go quite close to it in order to get its smell.<\/p>\n<p><strong>3. A diver is able to cut through water in a swimming pool. Which property of matter does this observation show? <\/strong><\/p>\n<p>A. The diver is able to cut through water in the swimming pool because matter is made up of particles which have vacant spaces. Between molecules of water, the inter molecular forces are not very strong. The diver can easily cut through water by applying force to displace water and occupy its place.<\/p>\n<p><strong>4. What are the characteristics of the particles of matter?<\/strong><\/p>\n<p>A. i) Particles of matter have space between them<\/p>\n<p>ii) Particles of matter are continuously moving.<\/p>\n<p>iii)       Particles of matter attract each other.<\/p>\n<p><strong>5. The mass per unit volume of a substance is called density. [density = mass \/ volume]<\/strong><\/p>\n<p><strong>Arrange the following in order of increasing density of air, exhaust from chimneys, honey, water, chalk, cotton and iron.                               <\/strong><\/p>\n<p>A. The order of increasing density is, air &lt; exhaust from chimney &lt; cotton &lt; water &lt; honey &lt; chalk &lt; iron<\/p>\n<p><strong>6. Tabulate the differences in the characteristics of states of matter: <\/strong><\/p>\n<p>A.<\/p>\n<table width=\"689\">\n<tbody>\n<tr>\n<td width=\"53\">S.No<\/td>\n<td width=\"138\"><strong>Characteristics<\/strong><\/td>\n<td width=\"106\"><strong>Solid<\/strong><\/td>\n<td width=\"216\"><strong>Liquid<\/strong><\/td>\n<td width=\"176\"><strong>Gas<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"53\">1.<\/td>\n<td width=\"138\">Mass<\/td>\n<td width=\"106\">Definite<\/td>\n<td width=\"216\">Definite<\/td>\n<td width=\"176\">Definite<\/td>\n<\/tr>\n<tr>\n<td width=\"53\">2.<\/td>\n<td width=\"138\">Shape<\/td>\n<td width=\"106\">Definite<\/td>\n<td width=\"216\">Not fixed. Acquires<\/p>\n<p>the shape of container<\/td>\n<td width=\"176\">Not fixed. Acquires the shape of container<\/td>\n<\/tr>\n<tr>\n<td width=\"53\">3.<\/td>\n<td width=\"138\">Volume<\/td>\n<td width=\"106\">Not possible<\/td>\n<td width=\"216\">Definite<\/td>\n<td width=\"176\">Indefinite<\/td>\n<\/tr>\n<tr>\n<td width=\"53\">4.<\/td>\n<td width=\"138\">Compressibility<\/td>\n<td width=\"106\">Not possible<\/td>\n<td width=\"216\">Slightly compressible<\/td>\n<td width=\"176\">Highly compressible<\/td>\n<\/tr>\n<tr>\n<td width=\"53\">5.<\/td>\n<td width=\"138\">Fluidity<\/td>\n<td width=\"106\">Not possible<\/td>\n<td width=\"216\">Can flow<\/td>\n<td width=\"176\">Can flow<\/td>\n<\/tr>\n<tr>\n<td width=\"53\">6.<\/td>\n<td width=\"138\">Diffusion<\/td>\n<td width=\"106\">Slow<\/td>\n<td width=\"216\">Fast<\/td>\n<td width=\"176\">Very fast<\/td>\n<\/tr>\n<tr>\n<td width=\"53\">7.<\/td>\n<td width=\"138\">Intermolecular force<\/td>\n<td width=\"106\">Strongest<\/td>\n<td width=\"216\">Slightly weaker than in solids<\/td>\n<td width=\"176\">Negligible<\/p>\n<p>(very very less)<\/td>\n<\/tr>\n<tr>\n<td width=\"53\">8.<\/td>\n<td width=\"138\">Inter molecular spaces<\/td>\n<td width=\"106\">Very less<\/td>\n<td width=\"216\">large<\/td>\n<td width=\"176\">very large<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong> <\/strong><strong>7. Give reasons:             <\/strong><\/p>\n<p><strong>a. A gas fills completely the vessel in which it is kept:<\/strong><\/p>\n<p>A. Due to the force of attraction between particles of gas is very very less (negligible) and particles are free to move in all directions.<\/p>\n<p><strong>b. A gas exerts pressure on the walls of the container.<\/strong><\/p>\n<p>A. Gas molecules are free to move randomly in all directions. During their motion, they collide with one another and also with the walls of the container. The constant bombardment of the molecules on the walls of the container exerts a steady force. The force acting per unit area on the walls of the container is called pressure. Thus, gases exert pressure.<\/p>\n<p><strong>c. A wooden table should be called a solid.<\/strong><\/p>\n<p>A. A wooden table is called as solid because particles of wood are in fixed position and it has definite shape and volume.<\/p>\n<p><strong>d. We can easily move our hand in air but to do the same through a solid block of wood, we need a karate expert.<\/strong><\/p>\n<p>A. In air there is a lot of empty space between the molecules and the forces between the particles are very less. Hence, we can move our hand in air. Through a solid block of wood, only a Karate expert can do this because there are strong forces of attraction between molecules in a solid block of wood and there is no empty space between them.<\/p>\n<p><strong>8. Liquids generally have lower density as compared to solids. But you must have observed that ice floats on water. Find why? <\/strong><\/p>\n<p>A. Liquids generally have lower density than solids. But Ice has lower density than water because, it has an open cage like structure. In this structure, a lot of vacant spaces are left when water molecules are linked in ice. Because of lower density of ice, it floats on water.<\/p>\n<p><strong>9. Convert the following temperature to Celsius scale:          <\/strong><\/p>\n<p><strong> a) 300 K b) 573 K<\/strong><\/p>\n<p>A. a) Temperature on kelvin scale = temperature on Celsius scale + 273.<\/p>\n<p>300 = Temperature on Celsius scale + 273.<\/p>\n<p>Temperature on Celsius scale = 300 \u2013 273 = 27\u00baC<\/p>\n<p>b) Temperature on kelvin scale = temperature on Celsius scale + 273.<\/p>\n<p>300 = Temperature on Celsius scale + 273.<\/p>\n<p>Temperature on Celsius scale = 573 \u2013 273 = 300\u00baC<\/p>\n<p><strong>10. What is the physical state of water at:<\/strong><\/p>\n<p><strong> a) 250\u00baC                                        b) 100\u00baC<\/strong><\/p>\n<p>A. a) At 250\u00baC, physical state of water is steam (or) gas<\/p>\n<p>b) At 100\u00baC, Physical state of water is liquid (or) gas<\/p>\n<p style=\"text-align: center;\"><strong>Also Check: <a href=\"https:\/\/infinitylearn.com\/surge\/blog\/most-easy-and-scoring-chapters-of-cbse-class-9-science\/\" target=\"_blank\" rel=\"noopener\">Most Easy and Scoring Chapters of CBSE Class 9 Science<\/a><\/strong><\/p>\n<p><strong>11. Suggest a method to liquify atmospheric gases. <\/strong><\/p>\n<p>A. The atmospheric gas can be liquefied by cooling under pressure.<\/p>\n<p><strong>12. Why does a desert cooler cool better on a hot dry day? <\/strong><\/p>\n<p>A. It is due to evaporation process. A desert cooler cool better on a hot dry day, because the higher temperature on a hot day increases the rate of evaporation of water and the dryness of air also increases the rate of evaporation of water. That\u2019s why, a desert cooler cools better on a hot dry day.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone wp-image-57642 size-full\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/Cooler.png\" alt=\" Class 9 Science Chapter 1 \" width=\"108\" height=\"141\" \/><\/p>\n<p><strong>13. How does the water kept in an earthen pot (matka) become cool during Summer? <\/strong><\/p>\n<p>A. During summer water is kept in earthen wares to keep it cool because earthen wares (matka) has got a number of fine pores all around. water comes out through these pores and changes into vapor by taking heat from the inner water and atmosphere. Hence the water inside the Matka gets cooled.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone wp-image-57643 size-full\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/Earthen-pot.png\" alt=\" Class 9 Science Chapter 1 \" width=\"173\" height=\"129\" \/><\/p>\n<p><strong>14. Why are we able to sip hot tea or milk faster from a saucer rather than a cup?<\/strong><\/p>\n<p>A. Saucer has more surface area than cup, therefore rate of evaporation is more in case of saucer than the cup. Hence, more cooling will occur in the saucer. Hence, we are able to sip hot tea or milk faster from a saucer rather than a cup.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone size-full wp-image-57645\" src=\"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2021\/12\/Cup-and-saucer.png\" alt=\"\" width=\"244\" height=\"91\" \/><\/p>\n<p><strong>15. What type of clothes should we wear in summer and why?<\/strong><\/p>\n<p>A. In summer we perspire more. Therefore, to keep our body cool, we must wear cotton clothes. Since cotton clothes are good absorbers of water, they absorb the sweat quickly and expose it to the atmosphere for easy evaporation. Since evaporation produces cooling, cotton clothes help us in keeping our body cool.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Class_9_Science_Chapter_1_Topic_Notes\"><\/span>Class 9 Science Chapter 1 Topic Notes<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Chapter 1 \u2013 Matter in Our Surroundings <\/strong><\/p>\n<p>Unit 1: Matter \u2013 Its Nature and Behaviour include Chapter 1 \u2013 Matter in Our Surroundings. According to prior years&#8217; question papers and past trends, this unit is worth 23 points out of a possible 100. As a result, it&#8217;s critical to spend time studying this chapter thoroughly.<\/p>\n<p>The topics and subtopics from NCERT Solutions Class 9 Science Chapter 1 Matter in Our Surroundings are given below:<\/p>\n<p><strong>Physical nature of matter <\/strong><\/p>\n<p>The matter is Made Up of Particles<br \/>\nHow Small Are These Particles of Matter?<\/p>\n<p><strong>Characteristic of particles of matter <\/strong><\/p>\n<p>Particles of Matter Have Space between Them<br \/>\nParticles of Matter Are Continuously Moving<br \/>\nParticles of Matter Attract Each Other<\/p>\n<p><strong>States of matter <\/strong><\/p>\n<p>The Solid State<br \/>\nThe Liquid State<br \/>\nThe Gaseous State<\/p>\n<p><strong>Can matter change its state<\/strong><\/p>\n<p>Effect of Change of Temperature<br \/>\nEffect of Change o Pressure<\/p>\n<p><strong>Evaporation <\/strong><\/p>\n<p>Factors Affecting Evaporation<br \/>\nHow Does Evaporation Cause Cooling?<\/p>\n<p><strong>NCERT Solutions for Class 9 Science Chemistry Chapter 1<\/strong> can be used as a quick reference to help students understand complex concepts.<\/p>\n<p>From tiny sand particles on Earth to the enigmatic black holes at the centre of many galaxies, matter is one of the fundamental ingredients that make up everything in the universe. Matter plays a part in everything we see around us, interacting to create new materials that are both familiar and alien.<\/p>\n<p>Discover the molecular components of matter and how it operates. Learn about the origins of the term matter and its relevance in various branches of research. To help you with your studies, look into more important <a href=\"https:\/\/infinitylearn.com\/surge\/study-materials\/ncert-solutions\/class-9\/science\/\"><strong>NCERT Solutions for Class 9 Science<\/strong><\/a>.<\/p>\n<p><strong>NCERT Solutions for Class 9 Chapter 1: Matter in Our Surroundings includes exercises with question counts.<\/strong><\/p>\n<ul>\n<li>Page 3 of Exercises 1.1 &amp; 1.2 \u2013 Solutions to 4 Questions<\/li>\n<li>Page 6 of Exercise 1.3 &#8211; Solutions to 4 Questions<\/li>\n<li>Page 9 of Exercise 1.4 \u2013 Solutions to 4 Questions<\/li>\n<li>Page 10 of Exercise 1.5 &#8211; Solutions to 5 Questions<\/li>\n<li>Page 12 of Chapter Exercise \u2013 Solutions to 9 Questions<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Key_Features_of_NCERT_Solutions_for_Class_9_Science_Chapter_1\"><\/span>Key Features of NCERT Solutions for Class 9 Science Chapter 1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>The content was developed in great detail, with all jargon explained.<\/li>\n<li>Solutions have been crafted by skilled teachers and industry experts in an easy-to-understand manner.<\/li>\n<li>Questions from the most recent mandated curriculum are included.<\/li>\n<li>Exam questions from the previous year&#8217;s exam have been thoroughly examined.<\/li>\n<li>Additional learning resources, such as for example papers and previous year&#8217;s question  papers, are available.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"NCERT_Solutions_for_Class_9_Science_Chapter_1-_FAQs\"><\/span>NCERT Solutions for Class 9 Science Chapter 1- FAQ&#8217;s<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\t\t<section class=\"sc_fs_faq sc_card \">\n\t\t\t<div>\n\t\t\t\t<h3><span class=\"ez-toc-section\" id=\"Explain_the_various_state_of_matter_properties_discussed_in_Chapter_1_of_NCERT_Solutions_for_Class_9_Science\"><\/span>Explain the various state of matter properties discussed in Chapter 1 of NCERT Solutions for Class 9 Science.<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<div>\n\t\t\t\t\t\t\t\t\t\t<p>\n\t\t\t\t\t\tSix criteria determine the distinct features of a state of matter:  Shape  Quantity  Fluidity vs. Rigidity  Intermolecular force  Intermolecular space  Compressibility  The NCERT Solutions for Class 9 Science Chapter 1 curated by the specialists at INFINITY LEARN briefly explains these ideas. The solutions are written in simple language to make studying easy for the pupils. \t\t\t\t\t<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"sc_fs_faq sc_card \">\n\t\t\t<div>\n\t\t\t\t<h3><span class=\"ez-toc-section\" id=\"In_each_exercise_of_NCERT_Solutions_for_Class_9_Science_Chapter_1_how_many_questions_are_there\"><\/span>In each exercise of NCERT Solutions for Class 9 Science Chapter 1, how many questions are there? <span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<div>\n\t\t\t\t\t\t\t\t\t\t<p>\n\t\t\t\t\t\tEach exercise in NCERT Solutions for Class 9 Science Chapter 1 has the following number of questions:  4 Questions for Exercises 1.1 and 1.2  4 Questions for Exercise 1.3  4 Questions for Exercise 1.4  5 Questions (Exercise 1.5)  9 Questions for Chapter Exercise  \t\t\t\t\t<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"sc_fs_faq sc_card \">\n\t\t\t<div>\n\t\t\t\t<h3><span class=\"ez-toc-section\" id=\"Is_NCERT_Solutions_of_Chapter_1_for_Class_9_Science_adequate_for_test_preparation\"><\/span>Is NCERT Solutions of Chapter 1 for Class 9 Science adequate for test preparation? <span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<div>\n\t\t\t\t\t\t\t\t\t\t<p>\n\t\t\t\t\t\tThe experts at INFINITY LEARN created the NCERT Solutions for Class 9 Science Chapter 1 to enable students to ace the exam without anxiety. To boost student confidence, the key principles are given in the most systematic way possible. The NCERT Solutions address every last detail in order to aid students in their exam preparation. The solutions are available in both online and offline formats, allowing students to use them according to their needs. \t\t\t\t\t<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"sc_fs_faq sc_card \">\n\t\t\t<div>\n\t\t\t\t<h3><span class=\"ez-toc-section\" id=\"What_is_the_main_topic_covered_in_Class_9_Chapter_1_of_the_matter\"><\/span>What is the main topic covered in Class 9 Chapter 1 of the matter?<span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t<div>\n\t\t\t\t\t\t\t\t\t\t<p>\n\t\t\t\t\t\t In Class 9 Chapter 1, the main topic is the introduction to matter, its definition, and the different states it can exist in.\t\t\t\t\t<\/p>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/section>\n\t\t\n<script type=\"application\/ld+json\">\n\t{\n\t\t\"@context\": \"https:\/\/schema.org\",\n\t\t\"@type\": \"FAQPage\",\n\t\t\"mainEntity\": [\n\t\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"Explain the various state of matter properties discussed in Chapter 1 of NCERT Solutions for Class 9 Science.\",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"Six criteria determine the distinct features of a state of matter:  Shape  Quantity  Fluidity vs. Rigidity  Intermolecular force  Intermolecular space  Compressibility  The NCERT Solutions for Class 9 Science Chapter 1 curated by the specialists at INFINITY LEARN briefly explains these ideas. The solutions are written in simple language to make studying easy for the pupils.\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t,\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"In each exercise of NCERT Solutions for Class 9 Science Chapter 1, how many questions are there? \",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"Each exercise in NCERT Solutions for Class 9 Science Chapter 1 has the following number of questions:  4 Questions for Exercises 1.1 and 1.2  4 Questions for Exercise 1.3  4 Questions for Exercise 1.4  5 Questions (Exercise 1.5)  9 Questions for Chapter Exercise\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t,\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"Is NCERT Solutions of Chapter 1 for Class 9 Science adequate for test preparation? \",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"The experts at INFINITY LEARN created the NCERT Solutions for Class 9 Science Chapter 1 to enable students to ace the exam without anxiety. To boost student confidence, the key principles are given in the most systematic way possible. The NCERT Solutions address every last detail in order to aid students in their exam preparation. The solutions are available in both online and offline formats, allowing students to use them according to their needs.\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t,\t\t\t\t{\n\t\t\t\t\"@type\": \"Question\",\n\t\t\t\t\"name\": \"What is the main topic covered in Class 9 Chapter 1 of the matter?\",\n\t\t\t\t\"acceptedAnswer\": {\n\t\t\t\t\t\"@type\": \"Answer\",\n\t\t\t\t\t\"text\": \"In Class 9 Chapter 1, the main topic is the introduction to matter, its definition, and the different states it can exist in.\"\n\t\t\t\t\t\t\t\t\t}\n\t\t\t}\n\t\t\t\t\t\t]\n\t}\n<\/script>\n\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Class 9 Science Chapter 1: This chapter has been withdrawn from the Revised Term-wise CBSE Syllabus 2025-26. From the perspective [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_yoast_wpseo_focuskw":"Class 9 Science Chapter 1","_yoast_wpseo_title":"NCERT Solutions for Class 9 Science Chapter 1 Matter in our surroundings","_yoast_wpseo_metadesc":"Find NCERT Solutions for Class 9 Science Chapter 1 Matter in our surroundings might help students prepare for future exams more successfully","custom_permalink":"study-materials\/ncert-solutions\/class-9\/science\/chapter-1-matter-in-our-surroundings\/"},"categories":[19,63,72],"tags":[],"table_tags":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>NCERT Solutions for Class 9 Science Chapter 1 Matter in our surroundings<\/title>\n<meta name=\"description\" content=\"Find NCERT Solutions for Class 9 Science Chapter 1 Matter in our 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