IMPORTANT QUESTIONS ON EVS (ATET)

 WATER

1. Water that is stored in the spaces between rocks and dirt is called 

A. rain water 

B. Precipitation 

C. spring 

D. ground water

Answer: D

2. Water sticking to water is called ________.

A. cohesion 

B. adhesion 

C. specific heat

D. density 

Answer: A

3. What percentage of water on Earth is saltwater?

A. 3

B. 97

C. 25

D. 50

Answer: B

4. Water forms droplets. What property of water does this demonstrate?

A. cohesion 

B. precipitation 

C. adhesion 

D. surface tension 

Answer: A

5. Water in the form of gas is called?

A. condensation 

B. evaporation 

C. water vapour 

D. ice

Answer: C

6. Where is most of Earth's freshwater located?

A. in polar ice cap

B. in lakes and rivers 

C. as groundwater 

D. in the oceans 

Answer: A

7. Which of the following is an example of a benthos.

A. benthos

B. free swimmer

C. bottom dweller

D. plankton 

Answer: D

8. Which type of irrigation pours water through canals and waterways?

A. flood irrigation 

B. spray irrigation 

C. drip irrigation 

D. reservoir irrigation 

Answer: A

9. In a sewage system, what is added to kill harmful bacteria?

A. Chlorine 

B. sand

C. bacteria 

D. soap 

Answer: A

10. The term for pollution that can be traced to a specific location is

A. water pollution 

B. point-source pollution 

C. non point-source pollution 

D. runoff pollution 

Answer:  B

11. In a sewage plant, sludge and oil are consumed by

A. Chlorine 

B. sand 

C. bacteria 

D. soap 

Answer: C

12. What are the three forms of water on Earth?

A. groundwater, lakes and clouds

B. liquid water, frozen water and water vapour 

C. gas, stream and vapour 

D. groundwater, oceans and ice

Answer: B

13. Which two elements make up water?

A. Hydrogen and Oxygen 

B. Calcium and Oxygen 

C. Sodium and Calcium 

D. Hydrogen and Sodium 

Answer: A

14. How long can the average human survive without water?

A. 1 day

B. A few days 

C. A few weeks 

D A month

Answer: B

15. At what temperature does water boil?

A. 80 degree C

B. 100 degree C

C. 150 degree C

D. 200 degree C

Answer: B

16. At what temperature does water freeze?

A. -10 degree C

B. 5 degree C

C. 10 degree C

D. 0 degree C

Answer: D

17. What is the average pH level of pure water?

A. 3

B. 5

C. 7

D. 9

Answer: C

18. In which step of the water cycle does liquid water transform into gas?

A. condensation 

B. precipitation 

C. transpiration 

D. evaporation 

Answer: D