Rocks & Minerals Review

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What is the rock cycle?

Back

The rock cycle is a continuous process that describes how rocks change from one type to another over time. It has no beginning or end.

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What does hardness in minerals refer to?

Back

Hardness refers to a mineral's resistance to being scratched. It can be tested using tools like a steel nail, aluminum nail, or fingernail.

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What is fracture in minerals?

Back

Fracture is the way a mineral breaks unevenly, resulting in a rough, jagged surface.

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What is a streak test?

Back

A streak test is performed by rubbing a mineral against a porcelain plate to observe the color of its powder.

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What can be found in sedimentary rocks?

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Sedimentary rocks can contain rock fragments, sand, minerals, shells, and fossils.

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What are igneous rocks?

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Igneous rocks are formed from the cooling and solidification of molten rock (magma or lava).

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What are metamorphic rocks?

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Metamorphic rocks are formed from existing rocks that are changed by heat, pressure, or chemically active fluids.

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What is the difference between cleavage and fracture in minerals?

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Cleavage is the tendency of a mineral to break along flat, even surfaces, while fracture is an uneven break.

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What is luster in minerals?

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Luster describes how light reflects off the surface of a mineral, indicating its shine or dullness.

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What is a mineral?

Back

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