Unit 9 Test Review ES

Front

What mineral is used as a lubricant and to make pencils?

Back

Graphite

Front

What physical property is represented by luster?

Back

Luster refers to the way light interacts with the surface of a mineral, indicating its shine or dullness.

Front

What type of rock is formed from the accumulation of plant material over time?

Back

Coal is formed from the accumulation of plant material, undergoing heat and pressure over time.

Front

Which two minerals are most difficult to distinguish based on color, luster, and streak?

Back

Halite and quartz are often difficult to distinguish based on these properties.

Front

At which step in the rock cycle does the formation of igneous rock occur?

Back

Igneous rock forms at Step A, where molten rock cools and solidifies.

Front

What is the definition of mineral?

Back

A mineral is a naturally occurring, inorganic solid with a definite chemical composition and a crystalline structure.

Front

What is cleavage in minerals?

Back

Cleavage is the tendency of a mineral to break along flat, even surfaces.

Front

What is the difference between a rock and a mineral?

Back

A rock is a solid aggregate of one or more minerals, while a mineral is a single, naturally occurring substance.

Front

What is the significance of streak in mineral identification?

Back

Streak is the color of a mineral in powdered form, which can help identify it more accurately than its surface color.

Front

What is the process of sedimentation?

Back

Sedimentation is the process by which particles settle out of a fluid, forming layers of sediment that can eventually become sedimentary rock.