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Hydro Drills 1

1. _______________________ is an area of land where water systems flow out from. water shed (drainage basin)
2. _____________% of Earth is land. 30%
3. ___________% of Earth’s water is FRESH water. 3%
4. ________________ is when precipitation seeps downward through the pores and spaces of soil. percolation
5. Would there be a higher or lower gradient at the headwaters of a river? higher
6. _____________% of Earth’s water is SALT water. 97%
7. This is when rocks are broken into smaller pieces. weathering
8. Most of Earth’s freshwater is found in the form of __________________? polar ice caps (glaciers)
9. _______________ is when smaller streams flow into larger streams or bodies of water. tributaries
10. The starting point of a river is called ____________________? headwaters
11. _____________% of Earth is water. 70%
12. Would precipitation cause and increase or decrease in a stream’s discharge? increase
13. Would a large amount of load cause an increase or decrease in erosion? increase
14. This is when sediments are dropped and laid down (page 48). deposition
15. The ending point of a river that feeds into the ocean is called _________________? mouth
16. What is the amount of water a stream carries _______________? discharge
17. This is when sediments are carried away to another location. erosion
18. Evaporation would cause an increase or decrease in a stream’s discharge? decrease
19. If fewer tributaries are present would there be an increase or decrease in a river’s discharge? decrease
20. Would there be a higher or lower gradient at the mouth of a river? lower
Created by: tiffany.green74



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