Minerals, Rocks, and Fossils. What are rocks made of?. minerals. Minerals are not made by people; they are …. …naturally occurring substances. Name four properties (or clues) that scientists use to identify minerals. Color, luster, streak, and hardness.
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…naturally occurring substances.
Name four properties (or clues) that scientists use to identify minerals.
Color, luster, streak, and hardness
Glassy, dull, shiny, greasy
Many minerals have the same color.
What are three testers that can be used to determine a mineral’s hardness?
What type of rock is formed when change occurs from heat and pressure in the Earth?
What type of rock is formed when weathering and erosion cause sediments to press together in layers?
How old must a fossil be?
Why do scientists study fossils?