Rock Notes Quiz

Which of the following is true about rocks?

• Rocks are composed of only one mineral.

• Rocks do not contain any nonmineral matter.

• Coal is not considered a true rock.

• Most rocks are a mixture of minerals.

What is a naturally occurring, solid mass of mineral or mineral-like matter?

• a rock

• a mineral

• lava

• a fossil

Which of the following is NOT considered to be a rock?

• coal

• sandstone

• pumice

• lava

Which of the following is NOT one of the three types of rock?

• Igneous

• Magma

• Sedimentary

• Metamorphic

The three groups of rocks are classified by ____.

• color

• grain size

• chemical composition

• how they formed

If granite undergoes high temperatures and high pressures at depth within Earth, what type of rock will be formed? Assume that the granite does not melt.

• a sedimentary rock

• a metamorphic rock

• magma

• an igneous rock

Where is the energy source found that drives the processes that form igneous and metamorphic rocks?

• the sun

• the wind

• Earth’s interior

• moving water

A rock that forms when magma hardens beneath Earth’s surface is called an ____.

• intrusive metamorphic rock

• intrusive igneous rock

• extrusive sedimentary rock

• extrusive igneous rock

A rock that forms from cooling lava is classified as an ____.

• intrusive igneous rock

• extrusive metamorphic rock

• extrusive igneous rock

• intrusive volcanic rock

As the rate of cooling of igneous rocks increases, the size of the crystals that form ____.

• decreases

• increases

• is not affected

• cannot be determined