Form when rocks cool slowly.
Fossils, rocks, climate.
How continents move.
Plate Tectonics Evidence
Rocks, fossils, climate, puzzle fit, glacioers, sea floor spreading.
Ocean crust is more dense.
Rate of Plate Movement
High Risk Cities
Cities where earthquakes and volcanoes are likely to happen.
Low Risk Cities
Cities where earthquakes and volcanoes are not likely to happen.
Hot spot and example
Area where magma from the mantle continually breaks through the crust.
i.e. Hawaiian Islands
Age of Ocean Rocks
Younger near floor spreading zone.
Formed from cooling lava.
A break in the Earth's crust that moves.
Thickest layer of the Earth, part liquid and part solid where convection currents are found.
Pressure inside Earth
Increases with depth
Temperature inside Earth
Increases with depth
Form at continental-continental convergent boundaries.
Outer layer of the Earth, the inner layer.
Another name for the mantle
Another name for the crust
Depression formed at a subduction zone.
The more dense plate is pulled into the mantle under the less dense plate.
Mid Atlantic Ridge
Divergent boundary in the middle of the Atlantic Ocean.
Formed at a continental-continental convergent boundary.
A chain of volcanic mountains formed at an ocean- continental convergent boundary.
A chain of volcanic islands formed at an ocean convergent boundary.
Theory of Continental Drift
Theory that continents move due to centrifical force.
Formed when two plates pull apart and land falls downward.
When two plates come together.
When two plates pull apart.
(sliding) when two plates grind each other.
Large supercontinent that existed 250 million years ago. (consisted of all 7 continents).
Earths crust made of land.
Earths crust located under the ocean.
Large pieces of earths crust that move due to convection currents.
A circular movement of a substance due to changes in temperature and density.
Sea Floor Spreading
When two oceanic plates pull apart, magma rises and new crust is formed.
Credited with the theory of Plate Tectonics.
Credited with the theory of Continental drift.
Theory of Plate Tectonics:
Theory that plates move due to convection currents.