Mining

Ore is 

• any type of rock
• a rock with metals
• a rock with metals worth something to someone
• a rock with minerals

A rock formed from lava or magma is classified as

• igneous
• metamorphic
• sedimentary

A rock formed from heat and pressure is

• igneous
• metamorphic
• sedimentary

Sedimentary rock results from 

• heating
• melting
• erosion
• pressure

What type of materials always make up minerals?

• organic
• inorganic
• metals
• nonmetals

The luster of a mineral describes 

• its density
• how it cracks
• its color
• the shininess

This may be easy to see, but a mineral's ______ can change due to impurities (not following the recipe 100%).

• breakage

• size

• luster

• color

Every mineral has to be _______.

• only one color

• naturally occurring

• man-made

• expensive

Reclamation is.....

• not required in the US.
• a process that causes significant environmental damage.
• returning the land back to its original condition after mining
• required for every country and every type of mine in the world.

Which of the following is NOT environmental impacts of mining?

• Destroys natural communities over large areas.

• Acid drainage pollutes groundwater.

• Creates minimal dust.

• Causes erosion