When a mineral breaks along rough, jagged surfaces it's called

• fracture

• cleavage

• hardness

• streak

#1 on the Mohs Hardness Scale and also used in baby powder.

• halite

• talc

• graphite

• gypsum

The least accurate way to identify a mineral.

• color

• hardness

• streak

• density

The measure of how easily a mineral can be scratched.

• streak

• color

• luster

• hardness

The way that a mineral reflects light. It can be metallic or non-metallic.

• streak

• hardness

• fracture

• luster

The color left by a mineral in its powdered form.

• streak

• density

• hardness

• smudge

The color left by a mineral in its powdered form.

• streak

• density

• hardness

• smudge

Color and hardness are examples of a mineral's

• chemical properties

• molecular qualities

• atomic structure

• physical properties

In order to be classified as a mineral a substance must be

• man-made

• organic

• able to be scratched by a penny

• naturally occurring

What is the number of the most easily scratched mineral on the Mohs Hardness Scale?

• 1

• 4

• 7

• 10