Natural Science CLEP Prep Practice Exam

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Prepare for the CLEP Natural Science Exam with our comprehensive study materials and practice questions. Test your knowledge and ace the exam by mastering key concepts.

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What do geologists use to identify minerals?

Color
Streak Color
Hardness
Density

The correct answer is: 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.