Minerals and Rocks Test

What is a mineral?

• A naturally occurring, inorganic solid with a definite chemical composition and crystalline structure.

• Any solid substance found in nature.

• A type of rock found on Earth.

• A material made by humans.

Which of the following is NOT a characteristic of a mineral?

• Naturally occurring

• Inorganic

• Liquid state

• Definite chemical composition

What are the two main types of minerals?

• Silicates and Non-silicates

• Igneous and Metamorphic

• Organic and Inorganic

• Crystalline and Non-crystalline

What are the three main types of rocks?

• Igneous, Metamorphic, Sedimentary

• Silicate, Nonsilicate, Carbonate

• Hard, Soft, Brittle

• Volcanic, Organic, Synthetic

What determines the size of crystals in an igneous rock?

• The amount of light it receives

• The cooling rate of the magma or lava

• The amount of water present

• The rock’s color

What is the hardest mineral on the Mohs scale?

• Quartz

• Talc

• Diamond

• Feldspar

How do metamorphic rocks form?

• From cooling magma

• From sediments compacted together

• From heat and pressure altering existing rock

• From volcanic eruptions

All minerals have a crystalline structure.

• True

• False

Coal is classified as a mineral.

• True

• False

Metamorphic rocks form when existing rocks are exposed to heat and pressure.

• True

• False