Igneous Rock Identification Quiz

Rock Name

• Granite

• Rhyolite

• Andesite

• Pumice

Rock Name

• Obsidian

• Basalt

• Scoria

• Vesicular Basalt

Rock Name

• Scoria

• Basalt

• Andesite

• Gabbro

Rock Name

• Basalt

• Granite

• Scoria

• Andesite

Rock Name

• Diorite

• Rhyolite Porphory

• Rholite

• Pumice

Rock Name

• Peridotite

• Diorite

• Gabbro

• Basalt

Rock Name

• Gabbro

• Basalt

• Basalt Porphyry

• Scoria

Rock Name

• Gabbro

• Basalt

• Basalt Porphyry

• Scoria

Intrusive igneous rocks cool slowly because they form underground.  Because they cool slowly, intrusive igneous rocks have large, sometimes interlocking, crystals that you can see.  Which of the following is NOT an intrusive igneous rock?

• Gabbro
• Diorite
• granite
• basalt

The rock shown is GABBRO.  We can tell that it is an ______________ igneous rock that cooled slowly underground because it has large, visible crystals.

• extrusive
• intrusive