A fault is a _____ in the earth's crust, and a fold is a _____ of the earth's crust.

A foliated metamorphic rock forms when crystals _____.

A volcanic island arc forms when ________.

As a market moves from a single seller to a competitive one, a product's price _____.

Clouds release moisture on the ____ of mountains

_________ occur when the ocean's height increases and decreases periodically.

The nation believed to employ the practice of female infanticide most often is ________.

The most densely populated valley in central asia is the __________.

On average, developed countries spend about $________ annually per capita on health care.

Malthus noted that human populations grow ___ while food supply grows ____.

Malthus argued that ________