Unit Test

The observed number and angle of crystal faces.

• Cleavage and fracture

• Crystal structure

• Streak

• Luster

What mineral is used for pencils?

• Galena

• Quartz

• Graphite

• Magnetite

This mineral can be crushed into a white powder that is widely known as baby powder. This powder has the ability to absorb moisture, oils, and odor. What is the name of the mineral?

• Zinc

• Fluorite

• Talc

• Gypsum

A rock that forms when heat or pressure changes an existing rock is classified as a(n) _____.

• igneous rock.

• sedimentary rock.

• metamorphic rock.

• all of these.

If you found basalt rock, you could infer that...

• there may have been magma nearby in the past.

• seashells built up in the area long ago.

• it was once shale, but changed over time.

• there may be fossils in it.

How do coarse-grained intrusive igneous rocks form?

• From large rock particles cemented together

• From slow cooling magma

• From rapidly cooling lava

• From sedimentary rocks changed under pressure

What are the types of sedimentary rock?

• Chemical; Clastic; Inorganic

• Clastic; Igneous; Sedimentary

• Organic; Clastic; Chemical

• Igneous; Sedimentary; Metamorphic

Chemical rocks are ...

• made when water evaporates and minerals crystallize.

• made from heat.

• made from dead animals/plants.

• made from pieces of other rocks.

What is an example of an organic rock?

• Shale

• Breccia

• Coal

• Rock salt

By which of the given processes is coal formed?

• Carbonization

• Distillation

• Vaporization

• Evaporation