1. What percentage of Earth’s surface is covered with water?

a) 50%

b) 71%

c) 80%

d) 90%

2. Which is the largest ocean on Earth?

a) Atlantic Ocean

b) Indian Ocean

c) Arctic Ocean

d) Pacific Ocean

3. What is the main source of fresh water on Earth?

a) Oceans

b) Groundwater

c) Glaciers and rivers

d) Seas

4. What is the process by which water changes from liquid to vapor?

a) Condensation

b) Evaporation

c) Precipitation

d) Sublimation

5. Which of the following is not a freshwater source?

a) Lakes

b) Rivers

c) Oceans

d) Groundwater

6. Which term refers to the movement of water through the Earth’s atmosphere, land, and oceans?

a) Water Conservation

b) Water Pollution

c) Water Cycle

d) Water Tab

7. What is the name of the layer of water-bearing rock below the Earth’s surface?

a) Aquifer

b) Glacier

c) Reservoir

d) Ocean bed

8. Which of the following human activities causes water pollution?

a) Planting trees

b) Disposing industrial waste in rivers

c) Building dams

d) Rainwater harvesting

9. Which type of rainfall occurs due to the cooling of moist air as it rises over mountains?

a) Cyclonic rainfall

b) Orographic rainfall

c) Convectional rainfall

d) Acid rain

10. Which of the following is an artificial way to conserve water?

a) Rainfall

b) Groundwater recharge

c) River flow

d) Melting glaciers