Igneous Rock

Intrusive Igneous rocks will be 

• coarse grain (large crystals)

• fine grain (small crystals)

Coarse or Fine?

• coarse
• fine

How fast do Intrusive Igneous rocks cool?

• quickly
• slowly
• really fast

What is so unusual about PUMICE?

• It floats

• It is hard

• It has large crystals

• It burns

How are igneous rocks divided?

• Intrusive-Extrusive

• Heavy-Light

• Dark-Pale

• Color

Where is magma found?

• inside Earth

• on the surface of the Earth

Where is lava found?

• inside Earth

• on the surface of the Earth

How do extrusive igneous rocks form?

• from lava that erupted onto Earth's surface

• from magma that hardened beneath Earth's surface

Is this igneous rock, obsidian, fine-grained or coarse-grained?

• fine-grained

• coarse-grained

Pegmatite is a coarse-grained, intrusive, igneous rock. How did it form?

• rapidly cooling lava

• slowly cooling magma