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Plate Tectonics

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Richard Grimes

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Cards in this guide (9)
Subduction occurs when

Where the crust is destroyed

Which describes how a compass works

. The south magnetic pole of the compass points to Earth's north magnetic pole.

The sun's pole reversals are tied to its

The sun's pole reversal is tied to the cycle of sunspots.
The suns pole reversals are tied to its seasons. This can be shown on a graph.

What is true about compasses

compass magnets can be deflected by earths magnetic field or other permanent magnets

What country receives the least amount of rainfall anually

Bahrain receives the least amount of rainfall annually with 77 mm of rain.

Why do scientists think Earth's core contains iron

Samples of Earth's crust contain less iron than found in meteorites, and iron is a comparatively heavy element that would have sunk into the planet when it was being formed.

The continental crust is what

The continental crust is up to 70 km thick.

New crust forms

At ocean ridges

Which of the following is true of permanent magnets

magnetic stuff...

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