Rocks and Minerals

A solid substance that occurs naturally in rocks or in the ground is a...

• rock.
• mineral.

A solid substance made of one or more minerals is a...

• rock.
• mineral.

Which is NOT a physical property scientists use to identify and classify minerals?

• luster

• hardness

• size

• color

Which is NOT a physical property scientists use to identify and classify minerals?

• hardness
• streak
• magnetism
• texture

The Mohs scale measures...

• color.
• luster.
• hardness.
• streak.

How light reflects off a mineral (shiny/dull/metallic) is its...

• luster.
• hardness.
• streak.

The color of a mineral's powder that is left when the mineral is rubbed against a ceramic tile is called its...

• luster.
• hardness.
• streak.

When small pieces of rock break off, pile up in layers, and are pressed together to form a rock, it is called a(n)...

• igneous rock.
• sedimentary rock.
• metamorphic rock.

When heat and pressure change an existing rock into another rock, the new rock is a(n)...

• igneous rock.
• sedimentary rock.
• metamorphic rock.

When igneous rocks form inside Earth's surface, the slow cooling process allows the grains to...

• grow larger.
• stay smaller.