Hard water results from relatively high concentrations of dissolved ________.

Earthquakes occur most frequently near ________ margins.

Limestone is most likely formed in which of the following environments?

The silicate mineral that is found in the greatest variety of igneous rocks of various compositions is ________.

Siltstone or mudstone containing marine fossils likely formed in a ________ environment.

The lithosphere lies directly above the ________.

What is the difference between weather and climate?

The circumference of Earth is most nearly ________.

As more ice in the Arctic Ocean melts, what effect does this have on the water?

A heavy book is placed on top of a ball of pizza dough, causing the dough to flatten. This is an application of ________.