How We Classify Rocks

What are the 3 major types of rocks?

• Igneous, Metamorphic, Sedimentary

• Metamorphic, Igneous, Cementation

• Brown, Red, Gray

• Streak, Hardness, Breakage

Sedimentary rocks form deep within the Earth.

• TRUE

• False

Extreme Heat and Pressure creates a _________ rock.

• Igneous

• Metamorphic

• Sedimentary

• Mineral

This rock was formed by smaller pieces of rock that settled at the bottom of a lake millions of years ago. What type of rock is this?

• Sedimentary

• Igneous

• Metamorphic

The remains of living things that died long ago and their fossils are often found in what type of rock?

• igneous rocks

• sedimentary rock

• metamorphic rock

• all rocks

Sedimentary rocks are formed by

• Cooling of lava or magma

• Heat and pressure

• Compacting and cementing

What is the breaking down of rocks?

• Weathering

• Clastic

• Vesicular

Sedimentary rock is formed when grains of sediment undergo

• metamorphism

• compaction and cementation

• melting

• solidification

Volcanic activity on Earth’s surface most likely results in the formation of which of the following types of rock?

• Mineral

• Igneous

• Sedimentary

• Rocks don't form like this

Ricardo has an igneous rock in his rock collection. Where did this rock most likely form?

• in a volcano

• on a forest floor

• on a coral reef

• at the bottom of a river