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Flashcards in Earth Deck (13):
0

Layers of the earth?

Inner core, Outer core, Mantle, Crust.

1

The two types of crust?

Continental crust and oceanic crust.

2

What lies in the mantle?

Molten rock (magma)

3

What are the earth's main plates?

Eurasian plate, Indo-Australian plate, Antarctic plate, Pacific plate, North American plate, Nazca plate, South American plate and African plate.

4

What was the original land mass called?

Pangaea.

5

Plate Boundaries

Divergent (constructive plates), Convergent (Destructive plates) and Transform (passive plates).
DC, CD and T.

6

theory of plates separating

continental drift

7

what causes the plates to move?

convection currents within the mantle cause the plates to move.

8

Plate boundaries

divergent/constructive


Convergent /destructive
--> <--

Transform/passive
^ l
l v

9

divergent constructive plates

divergent/constructive plate boundaries are when two plates separate. Magma rises to fill the gap. Volcanoes and mid ocean ridges are formed.

10

convergent/destructive plates

convergent/destructive plate boundaries are when two plates collide.
Volcanoes and fold mountains are formed.

11

Passive/transform plates

passive/transform plate boundaries are when two plates slide by/push past each other. Earthquakes occur.

12

Mid-ocean ridge

A mid-ocean ridge is formed when two plates separate under water. As plates separate the magma goes upwards and cools when it hits the sea water. When it coolds, it makes a new ocean floor. The ocean floor builds up to make ridges and mountain.s An example of a mid-ocean ridge is the mid-Atlantic Ridge.