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Geography 12 Tectonic Plates > Tectonic Exercise > Flashcards

Flashcards in Tectonic Exercise Deck (7)
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1
Q

Ocean basins vs continents

A

Ocean basins: older denser basalts

Continents: younger les dense basalts

2
Q

Upper part of mantle

A

Lithosphere

3
Q

What makes plates move?

A

Convection currents in the asthenosphere

4
Q

Theory of Isostasy

A

Lighter the continental mass the more they will float/rise

5
Q

Supercontinent

A

Pangea

6
Q

Continental drift

A

How Pangea separated

7
Q

How much are plates moving

A

2-3cm a year