Igneous Rocks Lesson

A natural mixture of minerals.

• erosion
• magma
• alloys
• rock

What does Ignis mean?

• hot
• fire
• steam
• flame

A type of rock that forms from the cooling of molten rock at or below the surface of the earth

• Igneous Rock
• Metamorphic Rock
• Sedimentary Rock
• chemical Rock

Igneous rock that forms from lava on Earth's surface

• Organic Rock
• Intrusive Rock
• Clastic Rock
• Extrusive Rock

Extrusive rocks that form quickly above the Earths surface have

• small crystals
• large crystals
• small and large crystals
• no crystals

Igneous rock that forms when magma hardens beneath Earth's surface

• intrusive Rock
• compaction
• Chemical Rock
• Clastic Rock

A slow cooling igneous rock will have _____ crystals

• large
• small
• average
• black

One common use for the igneous rock granite is...

• building material
• cutting tools
• abrasion in polishing
• cement

One common use for the igneous rock obsidian is...

• building material
• cutting tools
• abrasion in polishing
• cement

What is the most common type of extrusive rock?

• basalt
• granite
• obsidian
• porphyry