Science extra credit

2. part of a map that explains the symbols
6. small pieces of soil and rock
7. A unit of measure on a map used to represent distance on the earth.
13. The change in elevation between adjacent lines on a topographic map.
14. collection of landforms in an area
15. the movement of sediment from one place to another by water, wind or ice
17. Lines on a topo map that connect places of equal elevation.
19. processes that build up earth materials
20. An area along a river that forms from sediments deposited when the river overflows its banks, usually having rich soil

1. A landform made of sediment that is deposited where a river flows into an ocean or lake
3. Pieces of rock are dropped by a stream, lake, ocean, melting glaciers, wind
4. an earth process that breaks down rocks into smaller pieces
5. any process that breaks down earth material
8. the main path/course of the river
9. processes actions that happen on the earth's surface
10. Low-lying wet land with grassy vegetation.
11. showing how much landforms have changed over a long time
12. a map that uses a series of lines to show three-dimensional shapes on the earth's surface
16. An ecosystem in which water either covers the soil or is present at or near the surface for at least part of the year.
18. Any characteristic physical shape of the earth's surface.