Vocabulary Flashcards Preview

Summit Geology 9 > Vocabulary > Flashcards

Flashcards in Vocabulary Deck (25)
Loading flashcards...
1

Middle, fluid-like layer of Earth, 3000 km thick

Mantle

2

Extensive elongated depression of the sea floor at a subduction zone

Trench

3

Seismic wave that can travel through all the Earth's layers

P - waves (Primary waves)

4

Action that results when the oceanic portion of a plate descends into the mantle

Subduction

5

Chain of volcanic islands that form on the oceanic portion of an overriding plate

Volcanic island arc

6

Region where tectonic plates are moving together

Subduction zone

7

Fluid like layer of mantle over which the lithosphere drifts

Asthenosphere

8

Boundary at which two tectonic plates are moving together

Convergent Boundary

9

Theory that explains the movement of continents over Earth since it formed

Continental Drift Theory

10

Small region of very hot mantle

Hot Spot/ Mantle Plume

11

The solid centre of the Earth

Inner Core

12

Rigid outer layer of Earth's internal structure

Crust

13

Convection currents that occur in the mantle

Mantle Convection (I don't think we learnt this)

14

An undersea mountain range that occurs at a divergent plate boundary

Ridge

15

Process by which new sea floor is created at a divergent plate boundary

Sea floor spreading

16

One of 12 large and 20 smaller sections of Earth's lithosphere

Tectonic Plates

17

String of volcano created on an overriding continental plate parallel to boundary

Volcanic Arc

18

Theory that Earth is divided into large plates that move over the asthenosphere

Plate Tectonic Theory

19

Region of Earth's internal structure formed by crust and upper layer of mantle

Lithosphere

20

Plate boundary where plates move past each other in opposite directions

Transform Boundary

21

Waves produced by earthquakes

L - waves (Surface waves)

22

Name of the single land mass that existed 270 million years ago

Pangaea

23

Push originating from production of a mid-ocean ridge

Ridge push

24

Crack in the lithosphere where magma reaches Earth's surface

Volcano

25

Seismic waves that only pass through solid rock

Secondary Waves / Shear waves/ S-waves