What are rocks made of

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(No Transcript)
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What are rocks made of?
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Minerals are not made by people they are
naturally occurring substances.
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Name four properties (or clues) that scientists
use to identify minerals.
Color, luster, streak, and hardness
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Which property means the way the light bounces
off the mineral?
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What words can be used to describe a minerals
luster?
Glassy, dull, shiny, greasy
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Why is color not a good property to use to
identify a mineral?
limestone
slate
Many minerals have the same color.
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What are three testers that can be used to
determine a minerals hardness?
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What type of rock is formed when magma cools and
hardens?
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What type of rock is formed when change occurs
from heat and pressure in the Earth?
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What type of rock is formed when weathering and
erosion cause sediments to press together in
layers?
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Melted rock below the Earths surface is called
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Small bits and pieces of rocks are called
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The breaking down and wearing away of rocks is
called
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The movement of sediments from one place to
another is called
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What is any trace, mark, or remains of an
organism called?
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How old must a fossil be?
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What kind of rock are fossils usually preserved
in?
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They study them to learn about extinct plants and
animals.
Why do scientists study fossils?