The Fossil Record

Usually only the hard parts of the organism, such as the of animals form fossils.

• bones

• skin

• shells

• hair

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NGSS.MS-LS4-1

_________ are particles of soil and rock.

Most fossils form when organisms that die become buried in sediments.

• True

• False

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NGSS.MS-LS4-1

Fossils that form in this way are called _________ _______.

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NGSS.MS-LS4-1

Some remains that become buried in sediments are actually changed to rock.

• False

• True

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NGSS.MS-ESS1-4

A hollow space in the sediment in the shape of an organism or part of an organism is called a ____.

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NGSS.MS-ESS2-3

A ____ is a copy of the shape of organism that made the mold.

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NGSS.MS-LS4-1

Organisms can also be preserved in substances other than sediments.

• True

• False

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NGSS.MS-LS4-1

How can scientists understand how living things have changed through time?

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NGSS.MS-LS4-1

NGSS.MS-LS4-2

Scientists can determine a fossil's age in several ways

• radioactive dating

• fossil records

• relative dating

• DNA records