U4L1 Earth History (Fossils)

Front

This type of fossil forms when sediments bury an organism and then sediments change into rock; the organism decays leaving a cavity in the shape of the organism.

Back

mold

Front

This type of fossil forms when a mold is filled with sand or mud that hardens into the shape of the organism.

Back

cast

Front

This type of fossil forms when minerals soak into the buried remains, replacing the remains, and changing them into rock.

Back

petrified

Front

Trees and sometimes marine animals are sometimes fossilized this way: permineralized or petrified, trace, carbonized or carbon film, preserved or original remains.

Back

permineralized or petrified

Front

What substances might help preserve parts or a whole animal?

Back

tar, amber, ice

Front

This type of scientist finds, preserves, and interprets fossils remains.

Back

paleontologist

Front

Hardened tree sap is called

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amber

Front

Most fossils are found in __________ rock layers

Back

sedimentary

Front

What type of fossil is pictured?

Back

trace fossil

Front

What type of fossil is pictured? Options: mold, cast, trace fossil, petrified fossil

Back

cast