Minerals and Rocks

Which phrase refers to the repeating pattern of a mineral’s particles?

• solid structure

• crystal structure

• organic structure

• inorganic structure

Which statement describes one feature of a mineral’s definite chemical composition?

• It always occurs in pure form.

• It always contains certain elements.

• It cannot form from living or once-living materials.

• It cannot form from living or once-living materials.

• It cannot contain atoms from more than one element

Which statement describes streak?

• Streak refers to the way light is reflected by a mineral.

• Streak is the least accurate way to identify minerals.

• Streak is tested by scraping a mineral across a streak plate.

• The color of the streak is the same as the color of the mineral.

Which property indicates how light is reflected from a mineral’s surface?

• cleavage

• density

• luster

• Streak

Which correctly lists two characteristics of crystal faces that define crystal systems?

• angle and number

• number and color

• size and hardness

• size and angle

Which characteristic involves cleavage and fracture?

• the way a mineral breaks apart

• the color of a mineral’s powder

• the light that is reflected from a mineral’s surface

• the number and angle of crystal faces of a mineral

Which are considered two of the special properties that are used to identify certain minerals?

• hardness and luster

• streak and color

• cleavage and fracture

• magnetism and fluorescence

These minerals were formed through crystallization of molten materials.

Which statement best describes these two minerals?

• The mineral on the left formed from lava.

• The mineral on the right formed from magma.

• The mineral on the left has smaller crystals than the mineral on the right.

• The mineral on the left cooled more slowly than the mineral on the right.

Which is one way that minerals crystallize from materials dissolved in water?

• from the air

• from solutions that evaporate

• from hot water solutions when water boils

• from the soil

A mineral forms from water at the edge of a lake.

Which statement best describes this mineral?

• The mineral formed from lava.

• The mineral formed when hot water cooled.

• The mineral formed through evaporation.

• The mineral crystallized from magma.