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Which of the sedimentary particles illustrated below has traveled the greatest distance from its source?

Sandstone is an example of a __________ rock.

For the sample of the metamorphic rock gneiss shown below, choose the set of arrows which best shows the direction of differential stress which caused the foliation to develop. Mark your answer with the letter of the correct arrow pair.

If metamorphosed under confining pressure, a quartz sandstone would become which metamorphic rock?

Arkose is a sedimentary rock dominated by what mineral?

When an atom gives up or accepts an extra electron, so that the number of protons no longer is equal to the number of electrons, the result is ____.

Metamorphic rocks may form from __________.

Atoms of different elements can “stick together” (making compounds) via electrons sharing or trading arrangements called _________.   

One of the things that is distinctive about planet Earth is that it has _____ very distinct types of crust. (Insert a number)

The _______________ theory describes how the planets, Sun, and asteroids of our solar system initially formed.