Chapter 15 vocab Flashcards Preview

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Flashcards in Chapter 15 vocab Deck (14)
1

Mantle

the layer of rock between the earth's crust and core

2

core

the central part of the earth below the mantle

3

lithosphere

the solid, outer layer of the earth that consists of the crust and the rigid upper part of the mantle

4

Mesosphere

the strong, lower part of the mantle between the asthenosphere and the outer core

5

Asthenosphere

the soft layer of the mantle on which the tectonic plates move.

6

tectonic plate

a block of lithosphere that consists of the crust and the rigid, outermost part of the mantle

7

continental drift

the hypothesis that states that the continents once formed a single landmass, broke up, and drifted to their present locations

8

sea floor spreading

the process by which new oceanic lithosphere forms as magma rises toward the surface and solidifies

9

convergent boundary

the boundary formed by the collision of two lithospheric plates

10

divergent boundary

the boundary between 2 tectonic plates that are moving away from each other

11

transform boundary

the boundary between tectonic plates that are sliding past each other horizontally

12

convection

hot rock from deep within the earth rises, but cooler rock near the surface sinks. This causes the oceanic lithosphere to move sideways and away from the mid-ocean ridge.

13

subduction

when one plate dives beneath each other due to a convergent boundary

14

crust

the thin and solid outermost layer of the earth above the mantle