Rocks and Minerals

The center of the earth is called

• mantle

• crust

• core

• soil

An inorganic substance found naturally in the earth is called

• a mineral

• soil

• a rock

• a vein

The characteristic of a mineral to break along smooth, straight lines or into flat sheets is called

• fracture

• streak

• color

• cleavage

Most of the earth's mass is in the

• mantle

• crust

• core

• soil

What is the hardest mineral?

• graphite

• fluorite

• diamond

• gypsum

What was the purpose of the scratch test?

• to find if the rock contained calcite
• to find the hardness of the mineral 
• to find the color

The thin outer layer of the earth is called

• mantle

• crust

• core

• soil

A _______ would smooth the surface of a rock quicker than lake water.

• rushing river

• wind

• creek

• pond

A mineral that is rare and can be cut and polished, giving it a beautiful appearance

• Ore

• Crystal

• Gem

• Rock

A __________ is a natural, nonliving substance that makes up rocks. 

• Sedimentary rock
• Igneous Rock
• Mineral
• Sediment