Extra Questions – Class 6 Science Chapter 4 Sorting Materials Into Groups

Extra Questions – Sorting Materials into Groups Chapter 4 Class 6 Science

Deepen your understanding of material classification with these additional questions for Class 6 Science, specifically designed for Chapter 4, “Sorting Materials Into Groups.” These important questions for class 6 science chapter 4 are tailored to enhance your learning experience and are aligned with the NCERT and CBSE syllabus.

These extra questions are created to reinforce the concepts discussed in your NCERT textbook. They will help you think critically about the properties of different materials and why they are grouped in specific ways. For example, you can explore why metals are lustrous or why plastics are grouped separately from wood.

These CBSE class 6 Science chapter 4 extra questions are ideal for exam preparation or class reviews. They will help you test your knowledge and prepare more effectively for assessments. By engaging with these questions, you can build a stronger foundation in science, making you more confident and ready for more complex topics in future classes.

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CBSE Class 6 Science Syllabus 2024 -25

CBSE Class 6 Science Chapter 4 Extra Questions Answers

Below are the topics wise extra questions for class 6 Science chapter 4

Objects around us

Question 1. What is meant by classification?

Answer: Classification refers to the process of grouping or categorizing things based on their similar or contrasting qualities or properties.

Question 2. What is the importance of classification?

Answer: Classification is essential for several reasons:

• Identifying objects
• Categorizing objects
• Locating objects
• Recognizing similarities and differences among objects
• Facilitating and enhancing the study of items

Question 3. Why is mercury used in the production of thermometers?

Answer: Mercury is utilized in making thermometers because it is a liquid at room temperature, an excellent heat conductor, and its lustrous nature makes it easy to read the temperature displayed by the mercury level.

Online Courses for Class 6 HOTS

Question 4. On what basis can various objects be grouped?

Answer: Distinct objects can be grouped together based on the following characteristics:

• Size
• Shape
• Color
• Hardness
• Solubility in water
• Magnetism
• Heat conduction
• Transparency, etc.

Question 5. What is the significance of grouping objects?

Answer: Grouping objects helps in organizing them in a logical order, making them easier to manage and understand their properties. It also facilitates comparison between two objects when they are grouped together.

Question 6. How does grouping objects benefit a shopkeeper?

Answer: Grouping objects makes it easier for a shopkeeper to work efficiently. By organizing items on distinct shelves, he can quickly locate items when customers ask for them. If items were randomly placed, it would be difficult for him to find them quickly.

Question 7. Name the materials used to make the following items: Shoes, chair, coins, utensils, clothes.

Answer:

• Shoes: Leather, rubber, plastic, canvas
• Chair: Wood, metal, plastic, concrete
• Coins: Copper, silver, gold
• Utensils: Iron, copper, aluminium
• Clothes: Cotton, wool, silk, rayon, nylon.

Question 8. Name four materials that can be used to make school bags.

Answer: Cloth (cotton, jute, nylon, etc.), plastic, metal, or alloy.

Question 9. List three solutions commonly used in households.

Answer: Salt solution, sugar solution, lime juice, etc.

Question 10. Why is water essential for our body?

Answer: Water is vital for the body as it can dissolve a wide range of compounds and is a crucial component of our body’s cells.

Properties of Materials – Sorting Materials into Groups Extra Questions

Question 1. List five opaque and transparent materials.

Answer: Opaque materials:

1. Wood
2. Iron
3. Cardboard
4. Brick
5. Gold

Transparent materials:

1. Water
2. Glass
3. Air
4. Cellophane plastic
5. Fibreglass

Question 2. List five objects made from transparent materials.

Answer:

1. Beaker
2. Test tube
3. Conical flask
4. Glass jug
5. Glass doors

Question 3. List five transparent liquids.

Answer:

1. Water
2. Hydrochloric acid
3. Alcohol
4. Acetone
5. Petrol

Question 4. List five objects made from opaque materials.

Answer:

1. Books
2. Blackboard
3. Cardboard
4. Wall
5. Wooden furniture

Question 5. Why is water called the universal solvent?

Answer: Water is termed the universal solvent due to its ability to dissolve a wide range of compounds.

Question 6. List three liquids miscible in water.

Answer:

1. Milk
2. Glycerine
3. Soft drinks

Question 7. List three liquids immiscible in water.

Answer:

1. Edible oil
2. Kerosene oil
3. Petrol

Class 6 CBSE Foundation Course

Question 8. State conditions when pure water can lose transparency.

Answer: Pure water loses transparency when it cools and condenses into ice, which is not transparent.

Question 9. List substances soluble and insoluble in water.

Answer: Water-soluble substances: Salt, sugar. Water-insoluble substances: Sand, paint, chilli powder, desi ghee, blotting paper.

Question 10. Demonstrate the solubility of substances in water.

Answer: Fill six test tubes with water. Add a pinch of each substance to separate test tubes. Shake and observe. Common salt, sugar, and washing soda dissolve, while chalk powder, iodine, and sand do not.

Question 11. Describe a method to prove water’s transparency.

Answer: Mark a symbol on a white sheet. Place a beaker over the mark and observe. Fill the beaker with water and observe again. The mark remains visible, demonstrating water’s transparency.

Question 12. Why is a tumbler not made of cloth?

Answer: A tumbler is not made of cloth because it needs to hold liquids, which cloth cannot do effectively.

Question 13. Explain rough and smooth surfaces.

Answer: Rough surface: Uneven surfaces or ridged materials like coal. Smooth surface: Plain and even surfaces like marble.

Question 14. Name two gases soluble and insoluble in water.

Answer: Soluble: Oxygen and carbon dioxide. Insoluble: Hydrogen and nitrogen.

Question 15. List four properties of materials.

Answer:

1. Appearance
2. Hardness
3. Solubility or insolubility
4. Float or buoyancy
5. Transparency

Question 16. What are the similarities between iron, copper, and aluminium?

Answer:

1. They are all lustrous.
2. They are all metals.
3. They are hard.

NCERT Solutions Class 6 Science All Chapters

• Chapter 1 Food: Where Does It Come From?
• Chapter 2 Components of Food
• Chapter 3 Fibre to Fabric
• Chapter 4 Sorting Materials Into Groups
• Chapter 5 Separation of Substances
• Chapter 6 Changes Around Us
• Chapter 7 Getting to Know Plants
• Chapter 8 Body Movements
• Chapter 9 The Living Organisms and Their Surroundings
• Chapter 10 Motion and Measurement of Distances
• Chapter 11 Light, Shadows, and Reflection
• Chapter 12 Electricity and Circuits
• Chapter 13 Fun with Magnets
• Chapter 14 Water
• Chapter 15 Air Around Us
• Chapter 16 Garbage In, Garbage Out

Objective Type Questions – Extra Questions for Class 6 Science Chapter 4

Question 1. Match the following items given in Column A with that in Column B:

Answer:

Question 2. Fill in the blanks with appropriate words:

1. Grouping of things is done for ………….. .
2. Classification is done on the basis of some ……………. and ………… .
3. A thing can be made of different ……………. .
4. Different materials can be used to make ……………. .
5. Mustard oil is ……………….. in water.
6. A sugar syrup is a ……………….. .
7. Blue Vitriol (Neela though) is ……………… in water.
8. Sand is ……………. in water.
9. Lemon juice is ………………… in water.
10. …………………. substances are those through which we can easily see.
11. Materials which conduct heat quickly are called …………………….. of heat.
12. Iron is a …………… material.

Answer:

1. Grouping of things is done for organization.
2. Classification is done on the basis of some similarities and differences.
3. A thing can be made of different materials.
4. Different materials can be used to make the same object.
5. Mustard oil is immiscible in water.
6. A sugar syrup is a solution.
7. Blue Vitriol (Neela though) is soluble in water.
8. Sand is insoluble in water.
9. Lemon juice is miscible in water.
10. Transparent substances are those through which we can easily see.
11. Materials which conduct heat quickly are called conductors of heat.
12. Iron is a natural material.

Question 3. State whether the statements given below are True or False:

1. Grouping is a useful process.
2. All objects are made up of same kind of materials.
3. Things can be grouped on the basis of their shape and size.
4. Different types of materials have different properties.
5. Same thing can be made from different materials.
6. Things made of gold and aluminium have no lustre.
7. Use of a material depends on its properties and the purpose for which it is to be used. ,
8. A looking mirror or thing made of metals are smooth to touch.
9. All materials can be felt by one or more of our senses.
10. The amount of matter in any object is called its weight.
11. The materials which do not allow light to pass through them are called opaque,
12. The materials which conduct heat very slowly are called non-conductor of heat.

Answer:

1. True
2. False
3. True
4. True
5. True
6. False
7. True
8. True
9. True
10. False
11. True
12. False

Class 6 Foundation Course

Class 6 Science Chapter 4 Extra Questions MCQs

Question 4.
Choose the correct option in the following questions:

(i) What makes the basis of sorting materials into groups?

(a) Similarities in their properties
(b) Differences in their properties
(c) Both similarities and differences in their properties
(d) All of these

Answer:
(c) Materials are grouped on the basis of similarities and dissimilarities.

(ii) Which one will show a metallic lustre?

(a) Any surface of a metal
(b) Freshly cut surface of a metal
(c) Freshly cut surface of non-metal
(d) Surfaces of all materials

Answer:
(b) Metals when cut, their freshly cut surface shine.

(iii) An oily thin paper sheet will be

(a) transparent
(b) translucent
(c) opaque
(d) cannot be predicted

Answer:
(b) Only a part of the light passes through it.

(iv) Purpose of sorting material into groups is

(a) to study their properties
(b) convenience
(c) both (a) and (b)
(d) inconvenience

Answer:
(c) Materials are grouped for our convenience and to study their properties.

(v) Which is a set of transparent materials?

(a) Glass and air
(b) Water and glass
(c) Water and air
(d ) All of these

Answer:
(cl) Glass, air and water, all are transparent.

(vi) Choose the opaque object from the following:

(a) Charcoal
(b) Air
(c) Glass
(d) Water

Answer:
(a) Except charcoal, all three will allow the light to pass.

(vii) Which one of the following is not soluble in water?

(a) Turmeric powder
(b) Common salt
(c) Alum
(d) All are soluble

Answer:
(a) Only turmeric powder is not soluble in water.

(viii) Which object shines?

(a) Plastic toy
(b) Cotton shirt
(c) Steel spoon
(d) Stone piece

Answer:
(c) Steel spoon is a metallic object while all others are non-metals.

(ix) Which of the following has reddish-brown colour?

(a) Gold
(b) Copper
(c) Iron
(d) Brass

Answer:
(c) Iron has a reddish-brown colour.

(x) Which one of the following is insoluble in water?

(a) Alcohol
(6) Sodium chloride
(c) Coconut oil
(d) Sugar
Answer:
(c) Coconut oil is insoluble in water.

FAQs on Class 6 Science Chapter 12 Extra Questions