1. What's the most amount of rain an area can receive annually to be considered a desert?
15 inches 10 inches 20 inches 5 inches
2. How much of the human body is water?
72 percent 66 percent 85 percent 22 percent
3. About how much of all the water on Earth can we use for drinking, industry and other purposes?
20 percent 1 percent 10 percent 5 percent
4. How much of Southern Nevada's water comes from the Colorado River?
5. The hydrologic cycle says that water is constantly in motion. Of every 100,000 gallons of water, how much is actually in motion?
100,000 gallons 100 gallons 10 gallons 5 gallons
