题目内容
A collection of specimens that exhibit similar internal structure and chemical compositions are called mineral species
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The eight most abundant elements in the continental crust are Si, O, Fe, K, Mg, Na, Ca, Al.
Wells are drilled into the subsurface to remove water from the unsaturated zone.
Which era are we currently in?
Earth's outermost layer, consisting of the crust and upper mantle, is called the lithosphere.
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