Vesicular is a term used to describe a texture in ________ igneous rocks.

A pre-existing body of gneiss is subjected to heat and forms a melt. Later, the melt cools and crystallizes to form a(n) ________ rock.

The inner edge of a meander, where sediment is deposited, is a(n) ________.

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?