Topic 6 Earth's Surface Systems

5. glacier formed when ice and snow build up in a mountain valley
7. loose, weathered material on Earth's surface in which plants grow
8. decayed organic material in soil
10. water that moves over land
11. pieces of crushed rock and soil
12. sediment deposited where a river flows into an ocean or lake
13. water continuously flows down a slope
15. gravity causes erosion and moves sediment downhill
16. weathering rock is changed
17. underground water that seeps into spaces in soil
20. a glacier that covers much of a continent or large island
22. principle that states that geologic processes that operate today also operated in the past
23. weathering rock is physically broken down into smaller pieces
24. flat, wide area of land along a river that floods during rainy season and is rich in nutrients
25. wind removes surface materials often leaving behind desert pavement

1. the mixture of sediments that a glacier deposits directly on the surface
2. particles in wind, water, and ice rub particles against rock wearing away the rock
3. stream or river that flows into another larger river
4. the removal of rock particles by wind, water, ice, or gravity
6. some sediment gets carried away further down the shoreline with the ocean current
9. a glacier picks up rocks as it moves over the land
11. deposition of sand creating a landform
12. wind and water put down sediment
14. large mass of ice that moves slowly over land
18. sediment deposited where a stream flows out of a steep, narrow mountain valley
19. age a time period when continental glaciers covered larger parts of Earth's surface
21. wind-deposited sediment forming nutrient rich soil