Rocks and Minerals

A mineral's streak is the color of its 

• powder
• color
• crystal

Quartz, gold, and calcite are examples of .... , but coal is not.

• minerals
• elements
• compounds
• rocks

Geologists use the ... test to determine the hardness of a mineral.

• cleavage
• density
• scratch

The repeating pattern of a mineral's particles forms a solid called a(n) ..

• rock
• crystal
• atom

Slow cooling hot magma leads to the formation of ...crystals.

• small
• medium
• large
• tiny

Which is not an essential characteristic of any mineral?

• crystal structure
• solid
• formed by organic processes
• naturally occurring

Which lists the minerals in the correct order from softest to hardest?

• talc, diamond, calcite, feldspar
• diamond, feldspar, calcite, talc
• talc, calcite, feldspar, diamond

Which is a kind of rock that forms when heat or pressure change an existing rock?

• sedimentary
• igneous
• any rock
• metamorphic

About how many minerals make up most of the rocks in Earth's crust?

• 2
• 20
• 200
• 2000

Through the process of ...., metamorphic rock can become magma.

• heat/pressure
• weathering/erosion
• melting