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Is seawater mineral?

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Is gold nugget a mineral?

Oceanic crust is approximately ______ kilometers thick and composed of ______ .

The four Earth's spheres include ______ , ______ , ______ and ______ .

The origin and history of sandstone can often be deduced by examining the sorting, roundness, and mineral composition of its constituent grains.

A. True
B. False

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