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If an initially irregular coastline remains relatively stable, it will become ________ over time.

About 88 percent of geologic time is represented by the time span called the ________.

What are the mass and charge of an alpha particle?

Oceanic crust is mainly basaltic in composition; the mantle is more like the igneous rock peridotite in chemical composition.

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

If an initially irregular coastline remains relatively stable, it will become ________ over time.

Hard stabilization approaches often result in ________.

When caves on opposite sides of a headland unite, a(n) ________ results.

________ are further concentrated in a residual brine after NaCl is crystallized.

About 88 percent of geologic time is represented by the time span called the ________.