Rocks and Minerals Review

Which of the following best describes how scientists classify different rocks?

• Their shape

• How they formed

• Where they are found

What type of rocks are formed by great heat and pressure?

• Metamorphic rocks

• Igneous rocks

• Sedimentary rocks

What type of rocks are formed when magma or lava cools and hardens?

• Metamorphic rocks

• Igneous rocks

• Sedimentary rocks

Rocks are constantly changing from one type to another, but it can take millions of years.

• True

• False

What does the mineral property of hardness measure or describe?

• Describes how easy it is to scratch the surface of a mineral

• Describes how well a mineral reflects light

• Measures the density of the mineral

What does the mineral property of luster measure or describe?

• Describes how well a mineral reflects light

• The color of the mineral in powdered form

• Describes how a mineral breaks into pieces

What does the mineral property of streak measure or describe?

• Measures the density of the mineral

• The color of the mineral in powdered form

• Describes how a mineral breaks into pieces

Some minerals have a different colored streak than the color of their body.

• True

• False

The color of a mineral in powder form is called the mineral's 

• hardness
• specific gravity
• luster
• streak

How light reflects off of a mineral is called the mineral's 

• luster
• streak
• cleavage
• fracture