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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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Minerals, Rocks, and Fossils

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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


Which property means the way the light bounces off the mineral?

luster


What words can be used to describe a mineral’s luster?

Glassy, dull, shiny, greasy


Why is color not a good property to use to identify a mineral?

limestone

slate

Many minerals have the same color.


fingernail, penny, nail

What are three testers that can be used to determine a mineral’s hardness?


What type of rock is formed when magma cools and hardens?

Igneous


What type of rock is formed when change occurs from heat and pressure in the Earth?

Metamorphic


What type of rock is formed when weathering and erosion cause sediments to press together in layers?

Sedimentary


Melted rock below the Earth’s surface is called…

magma.


Small bits and pieces of rocks are called…

sediments.


The breaking down and wearing away of rocks is called…

weathering.


The movement of sediments from one place to another is called…

erosion.


What is any trace, mark, or remains of an organism called?

fossil


Now that’s old!!

10,000 years

How old must a fossil be?


What kind of rock are fossils usually preserved in?

sedimentary


They study them to learn about extinct plants and animals.

Why do scientists study fossils?


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