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100

The earth's crust on land compared to the earth's crust in the ocean is this.

What is thicker?

100

This was the name of an arrangement of Earth's land masses as a single supercontinent.

What is Pangaea?

200

This is what happens to the ratio of land to ocean over geological time.

What is changes back and forth?

200

This is the layer of Earth that tectonic plates are a part of.

What is the lithosphere?

200

These are what causes Earth's geothermal energy.

What are:

- radioactive decay of unstable isotopes

and

-heat from Earth's core left over from when the planet formed?

300

This is where the Earth's crust is thickest.

What is a mountain range?

300

According to the theory of plate tectonics, ths is what drives the movement of Earth's plates.

What is convection within the mantle?

300

These are all the ways tectonic plates can move.

What are vertically, horizontally, toward each other, alongside each other, away from each other.


400

Rock beneath the lithosphere (in the Asthenosphere and the Core is this/these state(s) of matter.

What are solid and liquid (plastic like solid in the asthenosphere)?

400

This varies from 1-16 cm. per year.

What is the rate at which tectonic plates move?

400

These are possible effects of plate tectonics.

What are earthquakes, islands, mountains, tsunamis, and volcanoes.

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