Topic 9 Review

2. movement Anyone of several processes by which gravity moves sediment downhill.
3. dune A deposit of wind- blown sand.
6. The loose, weathered material on Earth's surface in which plants can grow.
8. plain The flat, wide area of land along a river.
10. Small, solid piece of material that come from rocks or the remains of organisms; earth materials deposited by erosion.
11. age Time in Earth's history during which glaciers covered large parts of the surface.
14. The geologic principle that the same geologic processes that operate today operated in the past change Earth's surface.
18. A landform made of sediment that is deposited where a river slows into an ocean or lake.
19. drift The movement of water and sediment down a beach caused by waves coming in to shore at an angle.
21. weathering The type of weathering in which rock is physically broken into small pieces.
22. glacier A long, narrow glacier that forms when snow and ice build up in a mountain valley.
24. A stream or river that flows into a large river.
25. Any large mass of ice that moves slowly over land.
26. water Water that fills the cracks and spaces in underground soil and rock layers.

1. Process in which sediment is laid down in a new location.
4. fan A wide, sloping deposit of sediment formed where a stream leaves a mountain range.
5. glacier A glacier that covers much of a continent or large island.
7. A wind-formed deposit made of fine particles of clay and silt.
9. The process by which a glacier picks up rocks as it flows over the land.
12. Dark-colored organic material in soil.
13. off Water that flows over the ground surface rather than soaking into the ground.
15. The sediments deposited directly by a glacier.
16. A channel through which water is continually flowing downhill.
17. The process by which wind removes surface materials.
20. weathering The process that breaks down rock through chemical change.
23. The process by which water, ice, wind, or gravity moves weathered particles of rock and soil.