Natural Science CLEP Prep 2025 – 400 Free Practice Questions to Pass the Exam

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What do geologists use to identify minerals?

Color

Streak Color

Hardness

Geologists use the physical properties of minerals, such as color, streak color, hardness, and density, to identify minerals. However, while color and streak color can be helpful in differentiating between some minerals, they are not always reliable as some minerals can display a range of colors. Similarly, density can vary between minerals and can be difficult to accurately measure without specialized equipment. Hardness, on the other hand, is a consistent and easily observable property that can help geologists distinguish between different minerals.

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Density

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