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The ________ is the idea or concept that ancient life forms succeeded each other in a definite, evolutionary pattern and that the contained assemblage of fossils can determine geologic ages of strata.

Once a hurricane makes landfall, it ________.

Isotopes of what element are the stable, end products of both uranium decay series?

Where are the largest kettles located?

When mineral-rich groundwater permeates porous tissue, such as bone or wood, this is called ________.

In regions where deserts are expanding, ________ is said to be occurring.

The average composition of the continental crust most closely approximates that of ________.

Rock cleavage or slaty cleavage in slates is largely a consequence of abundant, parallel-aligned, very fine-grained mica flakes in the rock.

Which one of the following statements about sand dunes is correct?

The coldest atmospheric temperatures are found ________.