Materials Around Us — Quiz

Q1. Priya notes that paper is used to make notebooks, books, paper bags and tissue. This best illustrates that

• A. One material can be used to make many objects
• B. All objects are made of metal
• C. Paper is the only material that exists
• D. Each object needs a different material

Q2. Sheeta asks why a tumbler is not made of cloth. The best reason from the chapter is that

• A. Cloth is non-lustrous
• B. Cloth is opaque
• C. Cloth cannot hold water
• D. Cloth is cheap

Q3. Asha's mother keeps all the steel plates in one corner and the glass bowls in another. This everyday practice is an example of

• A. Adaptation
• B. Classification
• C. Solubility
• D. Lustre

Q4. Which set lists only lustrous materials as given in the chapter?

• A. Iron, copper, zinc, gold
• B. Paper, wood, rubber, jute
• C. Glass, water, air, cellophane
• D. Sugar, salt, chalk, sand

Q5. Ravi sees a shiny plastic handle and concludes it is a metal. The chapter would say his conclusion is

• A. Correct, because all shiny things are metals
• B. Incorrect, because some non-metals are coated with shiny layers
• C. Correct, because plastic is a metal
• D. Incorrect, because plastic cannot shine at all

Q6. The chapter says, 'rubber is harder than sponge but softer than iron.' This best shows that hard and soft are

• A. Absolute properties
• B. Relative properties
• C. Properties only of metals
• D. Properties only of liquids

Q7. In the hide-and-seek scene, Ghulan hides behind a wall, Sheeta behind a big tree, and Sara behind a frosted-glass door. The materials they used are, respectively

• A. Translucent, opaque, transparent
• B. Opaque, opaque, translucent
• C. Transparent, translucent, opaque
• D. Opaque, transparent, translucent

Q8. Which of the following is NOT listed in the chapter as a transparent material?

• A. Glass
• B. Water
• C. Air
• D. Cardboard

Q9. In Activity 6.7, which set of materials does NOT dissolve in water?

• A. Sugar and salt
• B. Chalk powder, sand and sawdust
• C. Sugar and chalk powder
• D. Salt and sawdust

Q10. When ORS packets are not available, the chapter says you can prepare ORS at home in one litre of boiled and cooled water using

• A. Six teaspoons of sugar and half a teaspoon of common salt
• B. One teaspoon of sugar and six teaspoons of salt
• C. Six teaspoons of salt only
• D. Half a teaspoon of sugar only

Q11. In Activity 6.8, three identical paper cups are half-filled with water (A), sand (B) and pebbles (C). Predict which cup the balance shows as heaviest

• A. Cup A — water
• B. Cup B — sand
• C. Cup C — pebbles
• D. All three cups weigh the same

Q12. Two students pour the water left in their bottles into two identical glass tumblers of the same capacity. One tumbler is half-filled, the other almost fully filled. Madam Vidya uses this to introduce the idea of

• A. Mass
• B. Solubility
• C. Lustre
• D. Volume

Q13. The units used to measure volume in the chapter are

• A. Gram and kilogram
• B. Litre and millilitre
• C. Metre and centimetre
• D. Second and minute

Q14. Which two properties are possessed by all materials and together define matter?

• A. Lustre and hardness
• B. Solubility and transparency
• C. Mass and volume
• D. Colour and shape

Q15. According to the 'Do you know?' box, the Ayurvedic Aṣṭāṅga Hṛdaya describes physical matter using

• A. Twenty guṇa arranged as ten pairs of opposite properties
• B. Five elements only
• C. Three doshas only
• D. Seven dhātus only