CA 9: Minerals and Rocks

A mineral always contains certain elements in definite proportions. This is referring to its

• streak

• definite chemical composition

• luster

• inorganic

The repeating pattern of a mineral's particles in a solid is known as

• crystal structure

• streak

• fracture

• luster

The property of a mineral splitting evenly along a flat surface is

• luster

• streak

• cleavage

• fracture

The color of a mineral's powder left behind after it is scratched on a piece of unglazed tile is its

• color

• cleavage

• luster

• streak

Because a mineral has a definite volume and shape, it is known as a

• solid

• liquid

• gas

• luster

What term means that a mineral CANNOT form from materials that were once part of a living thing?

• solid

• naturally occuring

• inorganic

• luster

How does a streak test help identify different minerals?

• minerals that leave a clear streak are usually gold

• if a mineral scratches a piece of tile, it is harder than the tile

• the streak left behind by a mineral helps classify the luster

• sometimes the streak can be a different color than the mineral's surface color

The mass of an object in a given space is known as its

• color

• luster

• density

• fracture

Earthy, shiny, waxy, metallic, and pearly are terms used to describe a mineral's luster. What might a scientist observe about a mineral that would help the scientist classify the luster as metallic?

• the mineral does not get scratched by any minerals and it is high on the hardness scale

• the mineral is very shiny and reflects a lot of light

• the mineral is very dull and does not reflect much light

• the mineral is transparent and looks like glass

How a mineral breaks apart when it does NOT split evenly is known as

• cleavage

• fracture

• luster

• solid