Free PDF Download of NCERT Solutions Class 9 Science Chapter 14 – CBSE Internal Assessment
NCERT Solutions for Class 9 Science Chapter 14 is primarily intended to serve as a handy reference and guiding solution to assist students in quickly and effectively resolving their questions. For the best preparation for internal assessment, NCERT Solutions for Class 9 Science comprises exactly solved questions and exercises.
NCERT Solutions for Class 9 Science is written by a team of subject matter experts and experienced instructors. NCERT’s Class 9 Solution was created with a concept-based approach in mind, as well as a precise solution strategy for the internal assessment. For a better grade, use NCERT Solutions for Class 9. The NCERT board has supplied a detailed and well-structured solution for a better understanding and comprehension of concept-based information. For easy access, NCERT for Class 9 Science Solutions is available in web and PDF format.
CHAPTER 14_NATURAL RESOURCES TEXTUAL SOLUTIONS
1.Why is the atmosphere essential for life?
A. i) Atmosphere contains various gases like O2 , CO2, N2 which are required for various life processes by plants and animals.
ii) CO2 gas is used by plants to prepare food by the process called
iii) Oxygen is required for burning, combustion and respiration.
iv) Ozone layer is acting as a protective layer, which avoids / prevents harmful UV rays to enter the earth’s atmosphere.
v) CO2 dissolved in water in the form of carbonates, is utilised by marine animals to form shells.
vi) Hence, we can say that atmosphere is essential for life.
2. Why is water essential for life?
A. Water is essential for :
i) all cellular activities ii) transportation of substances
iii) digestion iv) absorption of nutrients
v) maintaining the body temperature vi) excretion etc.
3. How are living organisms dependent on the soil? Are organisms that live in water totally independent of soil as a resource?
A. i) All living organisms directly or indirectly depend on the soil.
ii) Plants obtain water and minerals from the soil and prepare food for animals.
iii) Number of insects, worms like earthworms and animals like rabbits, rats etc. live in the soil.
iv) Even the organisms living in water too depend on soil for their needs.
4. You have seen weather reports on television and in news paper. How do you think we are able to predict the weather?
A. i) We can predict the weather based on the temperature, humidity, wind speed of a given time frame, air pressure and all other factors of a particular region.
ii) The information is collected by remote sensing and weather forecasting satellites and then sent to the meteorological departments to prepare weather reports.
5. We know that many human activities lead to increasing levels of pollution of the air, water bodies and soil. Do you think that isolating these activities to specific and limited areas would help in reducing pollutions?
A. Yes, isolating the human activities which cause pollution will help in minimising the levels of pollution to some extent.
6. Write a note on how forests influence the quality of our air, water and soil resources.
A. Air :
i) Forests help in purifying the air by absorbing pollutants.
ii) They add oxygen to the air and takes carbon dioxide gas during
iii) They control and reduce the Greenhouse effect.
iv) The transpiration helps in the formation of clouds and maintains the temperature of surrounding area.
i) Plants in the forest hold the soil and prevent soil erosion.
ii) They add nutrients to the soil due to the decomposition of huge vegetation present in forest.
Forests help in bringing rain and increasing the level of underground water.
7. How is our atmosphere different from the atmosphere of Venus and Mars?
A. i) Our atmosphere contains gases like nitrogen, oxygen, carbon dioxide, water vapour and other gases in a very small amounts. This makes the existence of life possible on the earth.
ii) Whereas atmosphere of Venus and Mars have about 95% of carbon dioxide. So existence of life is not possible.
8. How does the atmosphere act as a blanket?
A. i) Atmosphere maintains the temperature on the surface of earth during day and night times.
ii) It contains ozone in the upper layer which protects life from harmful ultra-violet
This is how atmosphere acts as a blanket to the earth.
9. What causes winds ?
A. i) The uneven heating of the atmosphere in different regions of the earth causes winds.
ii) The rotation of earth and presence of mountain ranges also help in the formation of winds, and its blowing direction.
10.How are the clouds formed ?
A. i) During day time, water from different sources like pond, lake, river, sea, well, etc. get evaporated and rises up along with the hot air.
ii) At a particular height, the air cools and water vapour condenses to form minute droplets to form clouds.
11.List any three human activities that you think would lead to air pollution.
A. i) Burning of fuels like coal, petrol, diesel
12. Why do organisms need water ?
A. i) Major portion of each and every living organism is composed of water.
ii) All cellular processes take place in water medium.
iii) All the reactions that take place within our body and within the cells occur between substances that are dissolved in water.
iv) Water also helps to transport substances from one part of the body to the other.
v) Hence, organisms need to maintain the level of water within their bodies in order to stay alive.
13. What is the major source of freshwater in the city / town / village where you live ?
A. i) The major sources of freshwater in the city / town / village is the underground water which is mostly taken out with the help of hand-pumps or tube-wells.
ii) The rivers flowing in the nearby areas, lakes and ponds also serve as the source of freshwater.
14. Do you know of any activity which may be polluting this water source ?
A. There are many activities which cause pollution of water sources such as :
i) dumping of waste from factories, sewage from our towns and cities into rivers or lakes.
ii) discharging hot water from cooling towers into the water bodies which affect the breeding capacity of aquatic organisms.
15. How is soil formed ?
A. Soil is formed by breaking of rocks at or near the surface of the earth by various physical, chemical and some biological processes.
16.What is soil erosion?
A. The loss of top soil by air, wind and water is called soil erosion.
17. What are the methods of preventing or reducing soil – erosion ?
A. Soil erosion can be prevented by :
i) proper soil management
iii) growing grass plants on hill slopes, sea shores, etc.
iv) crop rotation method
v) preventing overgrazing
18. What are the different states in which water is found during the water cycle ?
A. During water cycle, water exists in three states. They are – liquid (water), gas (water vapour) and solid (snow).
19. Name two biologically important compounds that contain both Oxygen and Nitrogen.
A. Two biologically important compounds that contain both oxygen and nitrogen are DNA (Deoxyribosenucleic Acid) and Proteins.
20. List any three human activities which would lead to an increase in the carbon dioxide content of air.
A. i) Burning of fuels like coal, petrol, diesel, etc.
21. What is the Greenhouse effect ?
A. The phenomenon of natural warming of the Earth’s surface is called Greenhouse affect.
22. What are the two forms of oxygen found in the atmosphere ?
A. i) Elemental oxygen is normally found in the form of a diatomic molecule (O2) in the lower regions of the atmosphere to the extent of 21%. It is non-poisonous form of oxygen.
ii) But in the upper layers of the atmosphere (stratosphere), it occurs in the form of ozone, containing three atoms of oxygen and having the molecular formula O3.
iii) Ozone is the poisonous form of oxygen but helps in preventing the entry of ultraviolet rays into the earth’s atmosphere.
NCERT Exemplar Solutions for Class 9 Science Chapter 14 are also available.
Class 9 Science Chapter 14 CBSE Notes
Chapter 14 – Natural Resources NCERT Solutions for Class 9 Science
The role of the atmosphere, the importance of air for a living, and other experiments and facts are explained in NCERT Class 9 Science Chapter 14 Natural Resources. It explains why the earth is unlike other planets such as Venus and Mars. This chapter also includes a variety of activities to help students grasp the ideas. NCERT Class 9 Science Chapter 14 Natural Resources discusses why water is referred to as a “wonder liquid” and the significance of rain. This chapter provides a thorough understanding of the water and nitrogen cycles. NCERT Solutions explain the solution in an easy-to-understand manner so that students of all levels can understand it. NCERT Class 9 Science Chapter 14 Natural Resources is part of Unit 4 and can easily earn you 6 points. The following are some of the themes covered in this chapter:
Air is the source of life (5 questions)
Water is a miraculous liquid (3 questions)
mineral abundance in the soil (3 questions)
The layer of ozone (5 questions)
questions for the end of the chapter (6 questions)
Exercise 14.1 Solution for Class 9 Science Chapter 14 Natural Resources
Chapter 14 – Natural Resources NCERT Solutions for Class 9 Science
- The importance of atmosphere is explained in NCERT Solutions for Class 9 Chapter 14.
- It represents the significance of rain and water.
- Winds are caused by the uneven heating of air over land and sea bodies.
- Explains how pollution of the air and water occurs in nature.
- The importance of manures and fertilizers, as well as their impacts
NCERT Solutions for Class 9 Science Chapter 14 – Natural Resources: Significant Features:
- All of the questions in the relevant NCERT textbooks are entirely solved in this book.
- NCERT Solutions uses simple language that students can grasp.
- These answers will help you pass the CBSE exams, Science Olympiads, and other competitive exams.
- To assist students in their preparations, provide detailed solutions to all of the questions.
NCERT Solutions for Class 9 Science Chapter 14 Frequently Asked Questions
What will I learn from NCERT Solutions for Class 9 Science Chapter 14?
- The importance of atmosphere is explained in Chapter 14 of NCERT Solutions for Class 9 Science.
- The significance of rain and water is paramount.
- The causes of winds are presented in simple terms to help students comprehend them better.
- This chapter discusses how air and water pollution arise in nature.
- Fertilizers and manures are discussed in terms of their effects and importance.
What are the topics covered in Chapter 14 of NCERT Solutions for Class 9 Science, and how many questions are there?
The following subjects are covered in Chapter 14 of NCERT Solutions for Class 9 Science:
- The source of life: The element of air (5 questions)
- Water is a miraculous liquid (3 questions)
- Mineral abundance in the soil (3 questions)
- The stratosphere’s ozone layer (5 questions)
- Questions to ponder at the end of each chapter (6 questions)
Explain the greenhouse effect, which is covered in NCERT Solutions for Class 9 Science’s Chapter 14.
The greenhouse effect is a natural phenomenon that occurs when solar energy is trapped in the earth’s atmosphere. Methane, ozone, water vapor, nitrous oxide, chlorofluorocarbon, and other significant greenhouse gases are examples. Students in Class 9 can use the NCERT Solutions created by INFINITY LEARN specialists to quickly grasp this idea. To assist pupils of all cognitive levels, complicated issues are explained in a simple and clear style.
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