Unit 7 Vocabulary

2. A string of islands formed by the volcanoes along a deep ocean trench
9. Process by which one tectonic plate slips beneath another tectonic plate
10. The process that creates new seafloor as plates move away from each other at the mid-ocean ridges
11. The height of an area above sea level
12. A rigid layer made up of the uppermost part of the mantle and the crust
17. The difference in elevation between the highest and lowest points of an area
18. States that the continents once formed a single landmass, broke up, and drifted to their present locations
19. A crack in Earth's outer crust along which movement takes place
21. A map that shows the elevation of an area in a flat two dimensional paper
22. Sections of the Earth's crust that move due to convection currents
26. A boundary along which two tectonic plates move apart, forming either a mid-ocean ridge or a continental rift valley.

1. A deep valley that forms where two plates move apart
3. A line on a topographic map connecting points with the same elevation.
4. Deep valley in the ocean floor that forms along a subduction zone
5. A plate boundary where two plates move past each other in opposite directions
6. An undersea mountain chain where new ocean floor is produced at a divergent plate boundary
7. A region where plates are pushing together and where a mountain range, island arc, and/or trench will eventually form
8. A circle with short lines from the loop pointing towards its center
13. The study of the shape and features of the Earth's Surface
14. Circular movement of a substance due to changes in temperature and density
15. The difference in elevation between two consecutive contour lines.
16. A flat area of land higher than the surrounding land
20. Image taken by a man made satellite used to identify land and erosional features
23. A bold or heavy line in a topographic map that shows the amount of elevation
24. Land features on the surface of the earth, such as mountains, valleys, etc.
25. The key to all the symbols used on a map