Metamorphic Rock Unit Test

1. Metamorphic rocks are formed from

• weathering, erosion, and deposition
• cooling magma or lava
• heat and pressure

2. Metamorphic Rock often has banded ribbon like layers.

• True
• False

3. The appearance of layers in metamorphic rocks is caused by deposition of sediments.

• True
• False

4. Movement of Earth's tectonic plates causes extreme ___________________ below Earth's surface.

• compaction and cementation
• weathering and erosion
• heat and pressure
• explosions

5. Heat and pressure can change sedimentary, igneous, or another older metamorphic rock into metamorphic rock.

• True
• False

6. Heat cannot change a rock unless it is melted.

• True
• False

7. The deeper the rock is buried in the Earth's crust, the greater the _________________ on the rock.

• movement
• gravity
• pressure
• mass

8. The rock in the photograph was once sedimentary rock. Now it is metamorphic rock. What is most likely to have changed the rock?

• Extreme heat at one time melted the sedimentary rock and pressure made it flow in varying directions.
• An earthquake caused tectonic plates to shift and pressure on soft sedimentary rock shaped it into wavy patterns.
• Heat made the rock less rigid and pressure moved it around.
• None of the above

Rock that is completely melted which then hardens into new rock is considered a form of metamorphic rock.

• True
• False

What is(are) the heat source(s) by which rocks are heated to change into metamorphic rocks?

• lava
• magma
• lava and magma
• neither lava nor magma