Classifying Igneous Rocks

Igneous rock forms in regions where--

• A rock is heated to melting point then cooled to a solid.
• Metallic minerals are put under extreme pressure.
• A river deposits sand and mud over a long time.
• Evidence of organisms is becoming fossilized.

Intrusive Igneous rocks will be 

• coarse grain
• fine grain

What is the most common Extrusive igneous rock?

• Granite
• Basalt
• Pumice
• Scorie

If an Igneous rock is dark-colored, what is the amount of silica?

• high
• low
• doesn't matter

What is one use of Granite?

• gravel
• weapons
• building materials
• skin abrasives

What is the most common Intrusive Igneous rock?

• Basalt
• Gabbro
• Diorite
• Granite

If a rock is formed from lava, what will the grains be?

• coarse
• fine

High or Low Silica?

• high
• low

Coarse or Fine?

• coarse
• fine

How do Intrusive Igneous rocks cool?

• quickly
• slowly
• really fast

Tags

NGSS.MS-PS1-4