Chapter 6: Materials Around Us Class 6 Science Curiosity Solutions English Medium-Extra Questions Examination Based

NCERT Solutions Class 6 Science Curiosity English Medium

Chapter 6: Materials Around Us

Topic: Extra Questions Examination Based

Chapter 6. Materials Around Us

The following important questions are prepared according to the latest CBSE pattern and the NCERT Curiosity textbook. These questions cover all the important concepts of the chapter and help students strengthen their conceptual understanding and prepare effectively for school examinations.

Important Questions with Answers

Students should first attempt these questions independently and then compare their answers with the solutions provided below.

1 Mark Questions

Question 1. What is a material?

Answer: A material is any substance that is used to make an object.

Question 2. What is matter?

Answer: Anything that has mass and occupies space is called matter.

Question 3. Name any two lustrous materials.

Answer: Iron and copper.

Question 4. Name any two non-lustrous materials.

Answer: Wood and paper.

Question 5. Which property helps us classify glass as transparent?

Answer: It allows light to pass through completely.

Question 6. Give one example of a soluble substance.

Answer: Sugar.

Question 7. Give one example of an insoluble substance.

Answer: Sand.

Question 8. What is the SI unit of mass?

Answer: Kilogram (kg).

Question 9. Which property determines whether a material is hard or soft?

Answer: Its resistance to scratching or compression.

Question 10. Why are materials classified?

Answer: To make their study and identification easier.

2 Marks Questions

Question 1. Why do different objects require different materials?

Answer:

• Different materials have different properties.
• The choice of material depends on the purpose of the object.
• This ensures better performance and durability.

Question 2. Differentiate between lustrous and non-lustrous materials.

Answer:

• Lustrous materials have a shiny surface.
• Non-lustrous materials do not shine.
• Metals are generally lustrous, while wood and paper are non-lustrous.

Question 3. What is the difference between soluble and insoluble substances?

Answer:

• Soluble substances dissolve in water.
• Insoluble substances do not dissolve in water.
• Examples: Sugar is soluble, whereas sand is insoluble.

Question 4. Why is glass used for windows?

Answer:

• Glass is transparent.
• It allows light to enter.
• It also protects us from dust and rain.

Question 5. What is meant by hardness of a material?

Answer:

• Hardness is the ability of a material to resist scratching or compression.
• Stone and iron are hard materials.
• Sponge and cotton are soft materials.

3 Marks Questions

Question 1. Explain the classification of materials based on transparency.

Answer:

• Transparent materials allow light to pass completely.
• Translucent materials allow only some light to pass through.
• Opaque materials do not allow light to pass through.
• Examples include glass, butter paper and wood respectively.

Question 2. Explain the importance of classifying materials.

Answer:

• It makes the study of materials easier.
• It helps compare different materials.
• It enables us to select suitable materials for different purposes.
• It supports scientific study and industrial applications.

Question 3. Describe the concept of matter.

Answer:

• Matter has mass.
• Matter occupies space.
• Everything around us is made of matter.
• Air, water, wood and metals are examples of matter.

Question 4. Explain the difference between mass and volume.

Answer:

• Mass is the quantity of matter present in an object.
• Volume is the space occupied by an object.
• Mass is measured in kilograms.
• Volume of liquids is measured in litres or millilitres.

Question 5. Why is the study of material properties important?

Answer:

• It helps us choose suitable materials.
• It improves the quality of manufactured products.
• It supports scientific and technological development.
• It helps conserve natural resources.

Long Answer Questions

Question 1. Explain the different properties of materials with suitable examples.

Answer:

Materials differ in their appearance, hardness, transparency, solubility, mass and volume. Metals such as copper and aluminium are lustrous, whereas wood and paper are non-lustrous. Stone and iron are hard materials, while sponge and cotton are soft. Glass and water are transparent, butter paper is translucent, and wood is opaque. Sugar and salt dissolve in water and are therefore soluble, while sand and chalk powder are insoluble. These properties help us choose suitable materials for making different objects.

Question 2. Describe the classification of materials and explain why it is important.

Answer:

Materials are grouped according to their common properties such as lustre, hardness, transparency and solubility. Classification makes it easier to study and compare different materials. It helps scientists, engineers and manufacturers choose the most suitable material for a particular purpose. Proper classification also improves learning and reduces confusion while studying numerous materials.

Question 3. Explain the concepts of mass, volume and matter.

Answer:

Matter is anything that has mass and occupies space. Mass is the amount of matter present in an object and is measured in kilograms or grams. Volume is the space occupied by matter and is commonly measured in litres or millilitres for liquids. Every object around us is made of matter and possesses both mass and volume.

Question 4. Explain the practical applications of different material properties in daily life.

Answer:

Different properties determine the use of materials. Transparent glass is used for windows because it allows light to pass through. Metals are used for utensils because they are strong and durable. Plastic is used for bottles because it is lightweight and waterproof. Cotton is used for clothing because it is soft and comfortable. These examples show that selecting the correct material depends on its properties.

Question 5. Discuss why knowledge of materials is important in science and technology.

Answer:

Understanding the properties of materials helps scientists develop new products and technologies. Engineers use suitable materials for constructing buildings, bridges and machines. Doctors use specialised materials for medical instruments. Knowledge of materials also helps in recycling, conservation of natural resources and sustainable development.

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