Rocks, Minerals & Igneous Rocks

Intrusive Igneous rocks will be 

• coarse grain
• fine grain

How do Intrusive Igneous rocks cool?

• quickly
• slowly
• really fast

___________ rock is igneous rock formed from lava that erupted onto Earth's surface. 

• extrusive
• intrusive 

Igneous rock that formed when magma hardened beneath the surface of Earth is called ___________ rock. 

• extrusive
• intrusive 

True or False. Different igneous rocks may have similar mineral compositions and yet have very different textures. 

• True
• False 

Magma forms on the surface or under the surface?

• on the surface
• under the surface

The process by which igneous rocks are formed...

• heat and pressure deep underneath earth's surface
• melting and cooling of magma
• compaction and cementation of sediments

This rock cools so quickly that crystals have no time to form.

• Basalt
• Obsidian
• Gabbro
• Pumice

Why is coal NOT a mineral?

• It can be turned into a liquid.
• It contains organic matter (dead swamp plants).
• It is burned as a fuel to produce electricity.
• It is man-made.

A mineral's _______ is its color in POWDERED form.

• color
• hardness
• luster
• streak