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earth history vocab2

1. lithosphere layer of earth made up of crust and the rigid part of the upper mantle
2. asthenosphere layer in earth’s upper mantle that is soft because it is close to
3. tectonic plate one of large moving pieces of Earth’s lithosphere (oceanic/continental)
4. continental drift hypothesis that Earth’s continents move on Earth’s surface
5. Pangaea hypothetical super continent that included all the land masses of Earth, broke apart 200 million years ago
6. theory of plate tectonics theory stating that Earth’s lithosphere is broken into huge plates that move and change in size over time.
7. rift valley deep valley formed as tectonic plates move apart, such as along a mid- ocean ridge
8. magnetic reversal switch in the direction of the Earth’s magnetic field so that magnetic north and south switch
9. hot spot area where a column of hot material rises from deep within the mantle and heats the lithosphere, causing volcanic activity
10. subduction when oceanic plate sinks under another plate in Earth’s mantle
11. inner core is a ball solid metals that surrounds the inner core
12. outer core is a layer of liquid metals that surrounds the inner core
14. mantle is Earth's thickest layer
15. crust is a thin layer of cool rock
16. Mid-ocean ridge huge underwater mountains ranges
17. convection is energy transfer by the movement of a material
18. transform boundary occurs where plates scrape past each other
19. convection current a motion that transfers heat energy in a material
20. divergent boundary occurs where plates move apart
21. convergent boundary occurs where plates push together
22. continental-continental collision occurs where two plates carrying continental crust push together
23. Oceanic- oceanic subduction occurs where one plate with oceanic crust sinks
24. Oceanic-continental su
Created by: HodgesSW