Igneous Rock Review

Lava rapidly cooling on or above the surface of Earth forms what kind of rock?

• Extrusive Igneous Rock

• Intrusive Igneous Rock

Magma slowly cooling and hardening beneath the surface forms what kind of rock?

• Extrusive Igneous Rock

• Intrusive Igneous Rock

What rock texture does an extrusive igneous rock have? 

• Coarse grained

• Extrusive rocks do not have a texture.

• Fine grained/glassy

What rock texture do intrusive igneous rocks have? 

• Coarse grained

• Extrusive rocks do not have a texture.

• Fine grained/glassy

Extrusive igneous rocks cool 

• Slowly

• Rapidly

• These rocks never cool.

• These rocks cool at different speeds.

What type of igneous rock is basalt? 

• Extrusive

• Intrusive

• Basalt is not an igneous rock

What type of igneous rock is granite? 

• Extrusive

• Intrusive

• Basalt is not an igneous rock

Intrusive igneous rocks cool 

• Slowly

• Rapidly

• These rocks never cool.

• These rocks cool at different speeds.

How does the origin of intrusive igneous rocks create a coarse grained texture?

• The slow cooling of rock causes the crystals to take longer to form, causing them to be larger.

• The rapid cooling of rock causes the crystals to cool almost instantly, causing them to be small or non existent.

Tags

NGSS.MS-PS1-4

How does the origin of extrusive igneous rocks create a fine grained/glassy texture?

• The slow cooling of rock causes the crystals to take longer to form, causing them to be larger.

• The rapid cooling of rock causes the crystals to cool almost instantly, causing them to be smaller or non existent.