1. Which BEST describes the world's oceans? A. There is one ocean with one basin. B. There is one ocean with many basins. C. There are many oceans with one basin.

2. Which would be the BEST way for humans to conserve large amounts of water during a drought? A. install high flow toilets B. bathe once a week C. limit drinking water in restaurants D. limit use of outdoor sprinkler system

3. Which is an unlikely source of water for a river basin? A. melting snow B. ocean water C. melting ice

4. Which is true about APPROXIMATELY 80% of Earth's water supply? A. It is moving B. It is not moving C. It exists as salt water

5. Where is the majority of Earth's freshwater located? A. groundwater B. oceans C. lakes D. ice

6. Which factor MOST affects how water drains into a local watershed? A. evaporation B. precipitation C. difference in elevation

7. Which would greatly reduce local water availability? A. flood B. drought C. hurricane

8. How is the size of Raleigh's population related to the availability of water in the area? A. As the population increases, water availability increases B. As the population increases, water availability decreases C. As the population decreases, water availability decreases

A. lakes B. rivers C. oceans D. streams 9. Of the 74% of Earth's surface that is covered in water, which contains the MOST water? A. lakes B. rivers C. oceans D. streams

10. Why is freshwater in short supply on Earth? A. Most of it is frozen B. Most of it is polluted C. Most of it is in the atmosphere D. Most of it is trapped underground

11. What would happen to ocean water if ice caps and glaciers melted? A. More saltwater would enter the oceans, making it more dense. B. More freshwater would enter the oceans, making it less dense. C. More freshwater would enter the oceans, making it more dense.

12. Where is the majority of Earth's freshwater found? A. polar ice caps B. rivers C. ponds D. lakes

13. Which ocean receives the most freshwater output by way of rivers? A. Arctic Ocean B. Atlantic Ocean C. Indian Ocean

14. Which percentage represents the amount of freshwater on Earth? B. 23% C. 74%

15. Which is the most abundant freshwater resource in North Carolina? A. estuaries B. icebergs C. oceans D. rivers