SCIENCE: WHAT ARE MINERALS?

Front

What are minerals?

Back

Minerals are naturally occurring, inorganic solids with a definite chemical composition and a crystalline structure.

Front

How many different minerals are found on Earth?

Back

Over 4,700.

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What is the term for minerals that break in a jagged way?

Back

Fracture.

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What are diamonds made of?

Back

Diamonds are always made of carbon.

Front

Do mineral crystals come in different shapes?

Back

True.

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What property is measured when rubbing a mineral across a tile?

Back

Streak.

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What is the definition of 'cleavage' in minerals?

Back

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

Front

What is 'luster' in relation to minerals?

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Luster describes how light reflects off the surface of a mineral.

Front

What is the difference between 'fracture' and 'cleavage'?

Back

Fracture is uneven breaking, while cleavage is smooth breaking along flat planes.

Front

What is a common use of minerals in everyday life?

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Minerals are used in making jewelry, electronics, and construction materials.