Unit 7 Minerals Test Review

What type of igneous rock has a high silica content?

• Mafic

• Ultramafic

• Intermediate

• Felsic

Answer explanation

Felsic has a percentage of Silica. Mafic has a high percentage of Magnesium and Iron. Ultra Mafic has less than 90% mafic minerals, and very low in silica. Intermediate is a composition between felsic & Mafic composition.

Which type of sedimentary rock is formed when mineral fall out of solution, leaving sediment behind?

• Foliated

• Chemical

• Organic

• Clastic

Which characteristic of a mineral is the most easily observed but the least reliable?

• Color

• Luster

• Streak

• Hardness

______ is determined by rubbing it on a rough surface.

The Moh's scale shows the range of which mineral property?

• Color

• Luster

• Streak

• Hardness

Which of the following would be found in a quarry?

• Sand

• Copper

• Rocks

• Gold

• Gravel

Rapidly cooling magma produces

• Large crystals

• Small crystals

• No crystals

Which 3 are a characteristic that ALL minerals must have?

• Naturally Occuring

• Organic

• Solid under normal conditions

• Fixed chemical composition

Which of the following is NOT true of mining?

• Minerals are used to produce household items such as electronics and cosmetics

• The environmental impact of mining will likely remain the same in the future

• We can reduce our need to mine by recycling mineral-containing materials

• It will likely become more costly to mine in the future

Which type of metamorphism is caused by the bending and folding of preexisting rock?

• Contact

• Regional

• Hydrothermal

• Dynamic