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Evidence that glaciers once covered an area might include ________.

The greenhouse effect is caused by ________.

You are testing the groundwater quality of an aquifer and find that it has high amounts of arsenic. What is the likely source?

Earth’s magnetic reversals are likely due to ________.

The geocentric model was developed during the time of the ancient Greeks. This model ________.

An impermeable layer of rock or sediment is termed a(n) ________ in hydrogeologic contexts.

Any place where groundwater naturally flows out of Earth’s surface is termed a(n) ________.

High tide will be ________ during a full moon than normally.

A(n) ________ aquifer is more likely to be contaminated than a(n) ________ aquifer.

The outer edge of a meander, where material is being eroded, is a(n) ________.