Water

Q. About ____ percent of the Earth's surface is covered by water.

1. 80
2. 20
3. 40
4. 70

Q.

Which of the following is not an advantage of dams?

1. Generate electricity.

2. Control floods.

3. Supply water to nearby areas.

4. Contribute to deforestation.

Q. Discharge of which of the following leads to major contamination of water bodies?

1. Untreated sewage
2. Agriculture chemicals
3. Industrial effluents
4. All of the above

Q. Fresh water is continuously being renewed and recharged through the _______.

1. rock cycle
2. renewable cycle
3. photosynthesis process
4. water cycle

Q. Which kind of irrigation is highly effective in dry regions?

1. Sprinkle irrigation
2. Drip irrigation
3. Well irrigation
4. None of the above

Q. Which of the following statements do not make a case for water conservation?

1. Almost three-fourths of the Earth's surface is covered by water.
2. Many countries in the world are facing water shortages.
3. 97.3 percent of the Earth's water is present in Oceans.
4. Only around 1 percent of the water on Earth is usable fresh water.