Igneous Rocks and Volcanoes

What is the building block of rocks?

• Rocks

• Minerals

• Lava

• Grass

Igneous rocks are often called volcanic rocks.

• True

• False

Magma is melted rock ______ the earth's crust.

• above

• below

• in-between

Lava is melted rock _____ the earth's crust.

• above

• below

• in-between

Igneous rocks form whenever lava or magma _____.

• explodes

• heats up

• cools

When magma cools underneath the earth's crust, _______ rocks are formed.

• intrusive

• extrusive

When lava cools above the earth's crust, _______ rocks are formed.

• intrusive

• extrusive

Intrusive Rocks Have...

• Lava

• Small Crystals

• Big Crystals

• Grass

Extrusive Igneous Rocks Cool...

• Quickly

• Slowly

Tags

NGSS.MS-PS1-4

Is this Intrusive or Extrusive?

• Intrusive

• Extrusive