Human Impact on the Environment: Lessons 1 & 2

3. the process by which a glacier picks up rocks as it flows over the land
5. a channel through which water is continually flowing downhill
6. drift the movement of water and sediment down a beach caused by waves coming in to shore at an angle
7. small, solid pieces of material that come from socks or the remains of organisms; deposited by erosion
8. process in which sediment is laid down in new locations
10. movement any one of several processes by which gravity moves sediment downhill
11. the sediments deposited directly by a glacier
12. water that flows over the ground surface rather than soaking into the ground
15. dark-colored organic material in soil
17. a wind-formed deposit made of fine clay and silt
20. age time in Earth's history during which glaciers covered large parts of the surface
21. glacier a glacier that covers much of a continent or large island
23. fan a wide, sloping deposit of sediment formed where a stream leaves a mountain range
24. process by which water, ice, wind, or gravity moves weathered particles of rock
26. weathering the type of weathering that breaks down rock through chemical changes; changes composition

1. glacier a long, narrow glacier that forms when snow and ice build up in a mountain valley
2. a geologic principle that the same geologic processes that operate today operated in the past
4. water that fills the cracks and spaces in underground soil and rock layers
9. any large mass of ice that moves slowly over land
13. plain the flat, wide area of land along a river
14. a landform made of sediment that is deposited where a river flows into an ocean or lake
16. loose, weathered material on Earth's surface in which plants can grow
18. dune a deposit of wind-blown sand
19. weathering the type of weathering in which rock is physically broken into smaller pieces
22. a stream or river that flows into a larger river
25. the process by which wind removes the surface materials