Igneous Rocks and Volcanoes

Where is magma?

• inside 
• outside

What is the most common Intrusive Igneous rock?

• Basalt
• Gabbro
• Diorite
• Granite

Where is lava found?

• inside Earth

• on the surface of the Earth

How do extrusive igneous rocks form?

• from lava that erupted onto Earth's surface

• from magma that hardened beneath Earth's surface

How do intrusive igneous rocks form?

• from lava that erupted onto Earth's surface

• from magma that hardened beneath Earth's surface

Fine-grained igneous rocks with small crystals formed from

• rapidly cooling lava

• slowly cooling magma

Coarse-grained igneous rocks with large crystals formed from

• rapidly cooling lava

• slow cooling magma

What category of igneous rock has mineral crystals that are large enough to identify without a microscope?

• glassy
• aphanitic/extrusive
• phaneritic/intrusive
• porphyritic

What is the name of a felsic, intrusive (phaneritic) igneous rock?

• Granite
• Rhyolite
• Gabbro
• Basalt

What is the name of a felsic, extrusive glassy igneous rock that is shiny and sharp edges?

• Porphyry
• Obsidian
• Andesite
• Pumice