Rocks and Minerals

Formed from magma that cools slowly and rocks are coarse grained.

• Organic

• Clastic

• Extrusive

• Intrusive

Which of the following rocks are formed by the solidification of lava?

• Extrusive igneous rock

• intrusive igneous rock

• extrusive metamorphic rock

• intrusive metamorphic rock

• A—cleavage; B—hardness; C—streak

• A—cleavage; B—streak; C—hardness

• A—streak; B—cleavage; C—hardness

• A—streak; B—hardness; C—cleavage

Which mineral is the major component of drywall?

• selenite gypsum

• talc

• calcite

• muscovite mica

When rocks are changed from one type to another, this is referred to as

• metamorphism

• sea floor spreading

• the rock cycle

• compaction

What is the hardest known mineral

• talc

• diamond

• quartz

• gold

Example of metamorphic rocks

• gneiss

• gypsum

• pumice

• granite

Which of the following is true about rocks?

• Rocks are composed of only one mineral.

• Most rocks are a mixture of minerals

• Rocks do not contain any mineral matter.

• Coal is not considered a true rock.

Metamorphic rock forms as a result of

• heat and pressure

• compaction of sediments

• the cooling of magma

• the melting of rock

All of the energy that drives the formation of igneous rocks comes from

• the sun

• the earth's interior

• the breakdown of organic matter

• the movement of water over Earth's surface