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The breakdown of exposed rock into small fragments and dissolved ions is termed ________.

The silica tetrahedron that forms the backbone of all the silicate minerals is composed of silicon and what other element?

The theory of plate tectonics ________.

It is unusual for ________ to carry grains larger than sand.

In general, when rock is partially melted, the chemistry of the melt is ________.

________ is an example of a continental rift and the ________ is/are the result of collision.

Olympus Mons, the largest known volcano in our Solar System, is found on ________.

Under the theory of plate tectonics, the plates themselves are ________.

Differentiation of the core from the mantle early in Earth’s history was possible because the planet was ________ at the time.

By deep-sea drilling, the Glomar Challenger proved the theory that if the model of seafloor spreading was correct, then seafloor sediment should be ________ and ________ as one moves away from the spreading axis.