Minerals, Rocks, and the Rock Cycle Quiz with video link

What is the definition of a mineral?

• Organic matter with a specific atomic structure

• Man-made substance with a unique elemental makeup

• Inorganic naturally occurring solid with a definite chemical composition and atomic structure

• Living matter with a specific chemical composition

Which characteristic is not reliable for identifying minerals?

• Hardness

• Color

• Luster

• Taste or odor

What type of rock forms from the cooling and solidification of magma or lava?

• Extrusive igneous rock

• Intrusive igneous rock

• Metamorphic rock

• Sedimentary rock

Which type of igneous rock cools quickly and has small or no crystals?

• Obsidian

• Rhyolite

• Pegmatite

• Granite

How are clastic sedimentary rocks classified?

• According to their color

• According to the size of the sediments that make them up

• According to their mineral composition

• According to their luster

What type of metamorphism is primarily a result of pressure?

• Regional metamorphism

• Contact metamorphism

• Thermal metamorphism

• Dynamic metamorphism

Which characteristic is a key feature to look for in metamorphic rocks?

• Luster

• Color

• Streak

• Banding

According to the rock cycle, how are metamorphic rocks formed?

• From compaction and cementation of sediments

• From exposure to intense heat and/or pressure

• From weathering and erosion

• From melting into magma

What makes one mineral so precious or costly compared to another?

• One is harder to obtain

• one is more expensive to extract due to the remote location or depth in the earth

• the demand for one substance is much greater than the other

• All of the above

What is the main reason mineralogist identify minerals?

• To make a profit

• so that he and other geologist can understand rocks and geologic surroundings by which a particular mineral came.

• To make a name for themselves and become famous

• all of the above