Igneous Rock True or False

Igneous rocks make up the smallest amount of the volume of the Earth’s crust.

• True

• False

Igneous rocks form only from the solidification of lava.

• True

• False

Magma is made of melted minerals and lava is magma contained beneath the Earth’s surface.

• True

• False

The cooling and solidification of magma/lava forms igneous

rocks.

• True

• False

Volcanic rocks have large-grain crystals due to rapid cooling.

• True

• False

The magma that settles beneath the Earth’s surface cools slowly.

• True

• False

All igneous rocks have large crystals.

• True

• False

Igneous rocks are classified according to the way they form. (inside or outside)

• True

• False

Igneous rocks are also known as primary rocks and metamorphic and sedimentary rocks are derived from igneous rocks.

• True

• False