plate tectonics Flashcards
1
Q
asthenosphere?
A
constantly moves due to convection currents
movements powered by heat from core
lithosphere above
2
Q
lithosphere?
A
broken into little plates
mainly in mantle
below the crust
3
Q
what do convection currents do?
A
push and pull the plates in different directions
4
Q
when do convection currents form?
A
less dense magma rises cools then sinks
5
Q
constructive?(pull apart)
A
- continental continental
- oceanic oceanic
- volcanoes
- earthquakes
- rift valleys
6
Q
conservative?(slide past)
A
-earthquakes
7
Q
destructive?(subduction) c and c
A
- continental continental
- earthquakes
- fold mountains
8
Q
destructive? c and o
A
- volcanoes
- fold mountains
- earthquakes
9
Q
destructive? O and o
A
- ocean trenches(plate subducts leaving it)
- island arcs(lava cools)
- earthquakes
- volcanoes
