Mexico city is an example of how humans alter their environment because it was __________.

Oftentimes, our physical environment is _______________.

In dry climates, ________ is a (are) prevalent process(es).

The __________ serves as a border between the northeastern united states and canada.

The physical disintegration of rocks affects ___________ development and texture.

An unusually high tide is called a _______ tide.

The main culprit for global warming appears to be ________.

The global westerly wind zone most heavily impacts the ________ latitudes.

The general term applied to stream-deposited debris is ________.

The ________ is the layer of the atmosphere where electrified atoms are plentiful.

Shrubland has a wide distribution but is most common in ________ locales.