Intrusion and Extrusions

This type of igneous rock is formed below the Earth's surface.

• intrusive

• extrusive

This type of igneous rock is formed above the Earth's surface.

• intrusive rock

• extrusive rock

Intrusive igneous rocks cool very slowly. The grains of these rocks are

• large

• small

Extrusive igneous rocks are formed on Earth's surface from hardened lava. These rocks have what size of grains or particles?

• small

• large

How do extrusions differ from intrusions in rock layers?

• Extrusions are formed beneath the surface, while intrusions are formed on the surface.

• Extrusions are only found in sedimentary rock, while intrusions are only found in igneous rock.

• Extrusions are formed on the surface, while intrusions are formed beneath the surface.

• Extrusions and intrusions are the same thing.

Which igneous intrusion is labeled F?

• Batholith

• Lacolith

• Sill

• Batholith

What type of rock is formed from the cooling and solidification of magma or lava?

• Metamorphic

• Sedimentary

• Igneous

• Mineral

What is the main difference between extrusive and intrusive igneous rocks?

• Extrusive rocks are more durable

• Intrusive rocks form inside the Earth

• Extrusive rocks contain more minerals

• Intrusive rocks are always darker in color

This is granite. According to the large grains, what type of rock would this be?

• intrusive

• extrusive

This is obsidian which was formed on Earth's surface. What group of rock does this belong?

• intrusive

• extrusive