Igneous Rocks

Front

Which would have larger crystals, intrusive or extrusive igneous rocks?

Back

intrusive

Front

Magma forms on the surface or under the surface?

Back

under the surface

Front

_____ is an igneous rock made up of the minerals quartz, mica, feldspar.

Back

granite

Front

How do coarse-grained igneous rocks form? Options: from sedimentary rocks changed under pressure, from large rock particles cemented together, from rapidly cooling lava, from slowly cooling magma

Back

from slowly cooling magma

Front

Slow cooling magma far beneath Earth's surface results in _____ texture.

Back

coarse-grained

Front

Rapid cooling of lava in which no crystals form results in _____ texture

Back

glassy

Front

Fast cooling of lava in which small crystals form results in _____ texture.

Back

fine-grained

Front

Lava that is low in silica and high in iron usually forms _____ colored rocks.

Back

mafic

Front

Lava that is high in silica usually forms _____ colored rocks.

Back

felsic

Front

A slow cooling igneous rock will have _____ crystals

Back

large