The thickness of oceanic lithosphere is ________.

Continental lithosphere ________.

Ultimately, the base level of a stream valley can be no lower than ________.

The deepest part of a curved stream channel, where the flow is fastest, is called the ________.

What is a primary difference between phyllite and schist?

When magma crystallizes, ________ are formed.

Using the Mohs hardness scale below, which of the following statements is NOT true?

Wegener’s evidence for a united Pangaea comes from the fossil record of which type of organisms?

A volcanic island arc forms when ________.

Subduction zones are found at which basic plate boundary type?