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What process is responsible for the creation of elements heavier than iron?

Colder, older, oceanic lithosphere sinks into the mantle at _____________.

What scale is used to rank earthquakes based on intensity?

Roughly how long ago did the Big Bang occur?

After testing a hypothesis, you determine that the results of the test support your hypothesis. What is your next step according to the scientific method?

Clay-sized grains are transported as __________ in a river.

What type of topography forms where the underlying bedrock is relatively soluble, forming features such as caves, sinkholes, and cliffs?

_________ is an elevated boundary that separates two drainage basins. 

At which of the following plate boundaries would you expect intermediate and felsic igneous rocks, such as andesite or rhyolite, to form?

________ occurs from the overuse of groundwater and results in the lowing of the surface elevation as the underlying sediments compact, reducing the porosity of the sediments.