Tectonics Flashcards
1
Q
4 layers of earth
A
crust
mantle
outer core
inner core
2
Q
All continents used to be joined together…
A
Pangea
3
Q
Lithosphere
A
- uppermost layer
- cool and brittle
4
Q
Asthenosphere
A
Layer that plates move on
5
Q
Crust
A
Rock
6
Q
Mantle
A
Magma and molten rock
7
Q
Outer core
A
Liquid
8
Q
Inner core
A
Solid
9
Q
2 types of tectonic plates
A
Oceanic
Continental
10
Q
Oceanic plates
A
Newer
Heavier
Can sink
35-70 km
11
Q
Continental plates
A
Older
Lighter
Cannot sink
6-10 km
12
Q
What causes plates to move?
A
Magma which produces convection currents
13
Q
4 types of plate boundaries
A
Convergent
Divergent
Conservative
Collision
14
Q
Convergent
A
2 plates meet each other
OP sinks beneath CP
Destroyed in mantle
Volcanoes and earthquakes form
ex. Japan
15
Q
Divergent
A
2 plates move away (new crust)
Pulled apart by convection currents
Volcanoes and earthquakes form
ex. Mid Atlantic Ridge, Iceland
