Origin and Classification of Rocks Test

Which of the following are the three main types of rocks?

• Metamorphic

• Sedimentary

• Extrusive

• Igneous

Compaction, cementation & deposition help form this rock type

• igenous

• sedimentary

• metamorphic

• extrusive

Obsidian is shiny, smooth and usually black. It is an igneous rock, and forms when:

• Magma cools slowly underground
• Lava cools slowly underground
• Magma cools quickly on the surface
• Lava cools quickly on the surface

Marble is an example of...

• Igneous

• Sedimentary

• Metamorphic

Has small or no crystals because of rapid cooling

• sedimentary
• metamorphic
• extrusive igneous
• intrusive igneous

This rock is used in countertops

• granite

• pumice

• shale

• slate

This rock is used in cement

• granite

• limestone

• basalt

• pumice

A model that describes the formation, breakdown, and reformation of a rock.

• Fall Zone

• Weathering/ Erosion/ Deposition

• Rock Cycle

• Soil Profile

Formed by heat and pressure

• Sedimentary
• Metamorphic
• Extrusive Igneous
• Intrusive Igneous

The way a surface (of a mineral) reflect light. Either metallic or nonmetallic:

• Cleavage
• Streak
• Luster
• Reflection