science

2. plate slide apart
5. natural features of the earths surface
7. denser plate is pushed down and beneath a less dense plate
9. tectonic plates that lie under surfaceland masses
10. mechanical or chemical processes that break rocks into smaller pieces
11. distance above sealevel
13. tectonics plates that are at teh bottom of the ocean
17. solid fragments of weathered rock are eroded and then dropped into a new place
19. tectonic plates move towards each other and collide
20. long crack

1. map showing the shape and elevation of the land surface using contour lines
3. parallel pattern of rock
4. when two plates move away from each other
6. seafloor mountain system formed by divergent boundaries
8. photos or images from taken of earth from space
12. thicker line making every 5th contour line of the map
14. processes by which water,ice,wind, and gravity remove and transport sediment
15. study of shape of earths surface and its physical features
16. difference in elevation between two adjacent contour lines of topo.map
18. huge pices of lithospere