Processes that Shape the Earth
Across
- 6. boundary,A plate boundary where two plates move away from each other.
- 8. map,A map that shows the surface features of an area.
- 9. plate,a piece of the lithosphere that moves around on top of the asthenosphere
- 11. by which rock, sand, and soil are broken down and carried away (i.e. weathering, glaciation)
- 12. weathering,The process in which rock is broken down by changes in its chemical makeup
- 13. interval,the difference in elevation from one contour line to the next
- 15. drift,The hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their present locations
- 16. description of surface features of land.
- 18. line,A line on a topographic map that connects points of equal elevation
- 20. breaking down of rocks and other materials on the Earth's surface.
- 21. soft layer of the mantle on which the lithosphere floats.
Down
- 1. boundary,A plate boundary where two plates move toward each other.
- 2. plate going under another plate
- 3. difference in elevation between the highest and lowest parts of an area
- 4. contour,on a map, a darker, heavier contour line that is usually every fifth line and that indicates a change in elevation
- 5. weathering,Any process that breaks rock down into smaller pieces without changing the chemistry of the rock; typically wind and water.
- 7. rigid layer made up of the uppermost part of the mantle and the crust.
- 10. in which sediment is laid down in new locations.
- 14. boundary,A plate boundary where two plates move past each other in opposite directions
- 16. hypothesis that has been tested with a significant amount of data
- 17. tectonics,The theory that pieces of Earth's lithosphere are in constant motion, driven by convection currents in the mantle.
- 19. spreading,the formation of new areas of oceanic crust, which occurs through the upwelling of magma at midocean ridges and its subsequent outward movement on either side.