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Calcium, oxygen, and neon are all
O. elements
O. mixtures.
O. compounds.
O. ions.

To take a standard test such as the psat or plan students must have an

Which features are created on the exterior of a volcano when it erupts? check all that apply. vent crater hot spot lava flow boundary

The ability to accurately gauge the distance of the coffee cup on your desk as you reach for it is called: