1. Which of the following is a vast body of water that is not a suitable source of drinking water due to its high salt content? A. dam B groundwater C. sea D. waterfalls

2. Which of the following are built to collect and store water in reservoirs so people can use it depending on their needs? A dams Blakes C Seas D. wells

3. Which of the following is a type of water that is obtained from beneath the Earth's surface? A. groundwater C. running water B. reservoir water D. surface water

4. What can running water from a waterfalls generate? A. food C. power plant B. electricity D. outdoor activities

5. Which activity can NOT be done in or by the river? A. catching fish C. production of salt B. irrigation of crops D. washing of clothes

6. Water is used to prepare and cook food. This shows the importance of water i which of the following? A. agriculture B. household C. industry D. recreatio

7. Water is used in house decorations such as aquariums. This shows the importance of water in which of the following? A agriculture B. household C. industry D. recreatie

8. What percentage of the Earth's surface is covered with water? A. 45 % B. 55% C. 71% D. 83%

9. You should drink at least how many glasses of water per day? A 3-5 B. 8-10 C. 14-16 D. 20-24 10. Why can we not easily access most of the Earth's source of freshwater? They are A invisible to the human eye B. locked in glaciers and ice caps​