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Comets are primarily a mixture of ________.

If the lithology and fossil content of two bodies of rock on opposite sides of a canyon are identical, then these remaining outcrops were likely physically connected at one time and formed part of an extensive, sheet-like layer of rock. This idea summarizes the principle of ________.

Of the three primary compositional layers of the Earth (crust, mantle, core), which is the thickest layer?

Swamps, channels, floodplains, and submarine slopes all play a role in the development of ________.

If water is the transport mechanism of sediment, the grain size of sedimentary deposits most closely indicates the ________.

Minerals utilized by humans as a source of metal are termed ________ minerals.

Glacial till is composed of ________-sized particles.

Wegener’s proposal that the continents had once fit together as a single supercontinent was rejected by geologists at the time because ________.

According to the figure below, approximately how much has the sea level risen since the last ice age ended, approximately 16,000 years ago?

________ create(s) an easy route for oil to follow from the rock to a well.