Unit 7: Plate Tectonics Flashcards Preview

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Flashcards in Unit 7: Plate Tectonics Deck (16)
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1

Continental Crust

thicker part of Earth's crust that forms the large land masses

2

Convergent boundary

two plates coming together (COLLIDING)

3

Divergent boundary

two plates moving apart (DIVIDING)

4

Geologic event

a change to the structure of the Earth by tectonic activities

5

Mid-ocean ridge

undersea mountain range formed where two parts of the Earth's crust are moving apart

6

Ocean basin

large bowl shaped depression that holds ocean water; regions of crust below sea level

7

Oceanic crust

thinner part of Earth's crust that lies underneath the ocean basins

8

Plate

distinct sections of the lithosphere which make up the outermost layer of the Earth

9

Plate boundary

a region where two lithospheric plates meet

10

Sea-floor spreading

formation of new oceanic crust due to the upwelling of magma at mid-ocean ridges

11

Subduction

process where one plate slides under another

12

Tectonics

study of the movement of large masses of rock, known as plates, on the Earth's surface; includes folds, faults, and plate movement

13

Theory

an explanation of a set of related observations or events based upon proven hypotheses and verified multiple times by groups of detached researchers; can be used to explain and predict natural phenomena

14

Theory of plate tectonics

theory that describes plate movement and how it affects Earth's geologic features

15

Transform boundary

two plates sliding past each other in opposite directions (SLIDING)

16

Alfred Wegener

German scientist who proposed the theory of continental drift