CBSE Class 6 Science A Journey through States of Water (Class 6 NCERT New) Quiz 1

1. When puddles of water disappear after a sunny day, the process responsible for this change is called:

A Condensation B Evaporation C Freezing D Melting

2. Water droplets form on the outer surface of a cold glass kept in open air because:

A Water leaks through the glass B Ice melts on the surface C Water vapour in air cools and changes into liquid D Air pressure increases near the glass

3. Which statement correctly compares ice and water?

A Both ice and water have fixed shapes B Both ice and water take the shape of the container C Ice has a fixed shape, while water does not D Ice and water both flow easily

4. Which of the following best defines the process of melting?

A Conversion of liquid into gas on heating B Conversion of gas into liquid on cooling C Conversion of a solid into liquid on heating D Conversion of liquid into solid on cooling

5. Which of the following best defines the process of freezing?

A Conversion of solid into liquid on heating B Conversion of liquid into gas on heating C Conversion of gas into liquid on cooling D Conversion of liquid into solid on cooling

6. Which of the following best defines evaporation?

A Conversion of liquid into gas on heating till boiling B Conversion of gas into liquid on cooling C Conversion of a liquid into gas at the surface without boiling D Conversion of solid into liquid on heating

7. Which statement best explains why higher temperature causes faster evaporation?

A Heat gives energy to liquid particles, allowing them to escape into the air B Heat increases the amount of water in air C Heat changes water directly into steam D Heat reduces the surface area of water

8. What is meant by the cooling effect of evaporation?

A Increase in temperature when water changes into vapour B Drop in temperature when a liquid changes into gas by taking heat from surroundings C Cooling caused by wind movement D Change of gas into liquid due to cooling

9. What is the water cycle?

A Movement of water only in oceans B Continuous movement of water on, above, and below the surface of the Earth C Formation of clouds only during rain D Change of water only from liquid to gas

10. During evaporation, what happens to water vapour formed from water bodies?

A It settles at the bottom of rivers B It turns directly into ice C It remains mixed with water D It rises up into the air