Across
- 4. ______plate boundaries where plates move toward one another and collide
- 6. _______Lines are wavy, brown lines on a topographic map representing height
- 9. ________plate boundaries beneath the ocean where tectonic plates move away from each other
- 10. wearing away of Earth's surface by wind, water or glacial action
- 12. a flat rocky region created by land worn down to ancient rock
- 15. a huge, slow-moving river of ice
- 16. earth.
- 18. a broad, predominantly flat land area
- 19. ______ tectonics is a theory that the earth's crust is made up of rigid plates that are pushed by forces
- 21. _______ plate tectonic plate under land
- 22. a long low area often running between hills or mountains
- 23. the breaking down of rocks by physical or chemical processes
Down
- 1. soft layer of semi-molten rock under the lithosphere
- 2. landform created when oceanic plate goes under continental plate
- 3. a large landform that rises steeply above the surrounding terrain
- 5. U-shaped valley filled with water with steep cliffs created by glacier
- 7. ________ plate tectonic plate under ocean or sea
- 8. ________plate boundaries that are sliding past each other.
- 11. distance above sea level
- 13. 2D map that shows the 3D shape of the land
- 14. level average height of the ocean's surface, zero elevation
- 17. hard outer layer of Earth made up of moving plates
- 18. a large, flat area of high land rising above the surrounding land
- 20. the natural features that make up the Earth's surface