1. Which among the following is a change in substance?

• A change in its direction
• A change in the position
• A change in the size and length
• A change in the speed

2. Which of the following changes can be reversed?

• Rice that is boiled
• Wet clothes to dry clothes
• A flower turned into fruit
• Milk turned into curd

3. An iron smith makes weapons sharp by heating and beating them. What type of change does it cause?

• Physical change
• Biological change
• Chemical change
• Both physical and chemical change

4. Pick the odd one based on the reversibility of a change.

• Melting of candle
• Liquid wax turning into vapors
• Wax vapor burning into flame
• All the above

5. How can we say a change happened in a substance?

• Emission of heat
• Release of smoke
• Emission of light
• All the above

6. Rusting of iron is an example of?

• Only physical change
• Only chemical change
• Both physical and chemical change
• None of these

7. Conversion of a solid into a liquid is called?

• Evaporation
• Melting
• Condensation
• Freezing

8. What is a physical change?

• Change in the shape of an object
• Change in the appearance of the object
• Change in the size of an object
• All of the above

9. Which one is a periodic change among the following?

• Change of day and night
• Burning of fuels
• Drying of clothes
• Tearing of paper

10. Which of the following is an example of a chemical change?

• Evaporation of water
• Decomposition of waste
• Burning of fuels
• Breaking of a brick