__________ is a mineral that in various forms is abundant in aphanitic igneous rocks such as rhyolite, andesite, and basalt.

Rocks that form from the alteration of a rock due to changes in pressure and/or temperature are referred to as _________ rocks. (use correct spelling)

Metasomatic metamorphism may be induced by _________.

This explains why oceanic crust lies lower on the face of the Earth than continental crust: ________.

On the map shown, which of the numbered locations is a best example of an ancient, once-lofty, mountain belt?

In your own words, concisely describe five different and significant pieces of evidence used by Alfred Wegener in support of his hypothesis that “Pangaea” broke up into the separate continents we observe today (5 points). Then concisely describe three forms of additional evidence discovered later (post-World War II) that suggested seafloor spreading was actually the mechanism for their separation (3 points) Lastly, describe the important phenomenon of subduction zones within the overall theory of plate tectonics (2 points).

Atoms of different elements “sticking together” (making compounds) via loss and gain of valence electrons is called an/a _________ bond.   

 Sea-floor spreading is driven by convective turnover _______________.

Hotter, younger, oceanic magma rises at _________, and is most closely associated with the force known as _________.

From least to greatest “packages” of time, the geologic time scale is divided into _____.