Geography Vocab

1. a fracture or zone of fractures between two blocks of rock.
4. instruments used to record the motion of the ground during an earthquake
5. the mostly solid bulk of Earths interior
8. the location on the surface of the Earth directly above where the earthquake starts
10. boundary an area on Earth where two or more lithospheric plates collide
11. When magma flows or erupts onto Earth's surface, it is called lava
14. a steep conical hill of loose pyroclastic fragments
15. volcano a volcano that produces low viscosity, runny lava, it spreads far from the source and forms a volcano with gentle slopes
16. when an oceanic plate runs into a continental plate and slides beneath it.
18. long, narrow depressions on the seafloor that form at the boundary of tectonic plates where one plate is pushed, or subducts, beneath another.
19. The innermost part of the earth
20. an area under the rocky outer layer of Earth, called the crust, where magma is hotter than surrounding magma.

2. boundary places where plates slide sideways past each other
3. boundary a boundary formed when two tectonic plates move away from each other.
6. valley an area where the earth's crust is splitting apart.
7. a seafloor mountain system formed by plate tectonics
9. extremely hot liquid and semi-liquid rock located under Earth's surface
12. measure of the magnitude of an earthquake
13. a conical volcano built up by many layers of hardened lava and tephra.
17. the movement of particles through a substance, transporting their heat energy from hotter areas to cooler areas