Fossils: Question Preview (ID: 11419)

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A petrified fossil forms when
a) an organism is frozen.
b) minerals replace all or part of an organism.
c) an organism becomes trapped in amber.
d) gases from the organism and leave carbon behind.

On the geologic time scale, eras are divided into
a) ages
b) indexes
c) relative dates
d) periods

Most fossils form when organisms die and are buried in
a) sediment.
b) unconformities.
c) faults.
d) ice.

The gradual change in living things over a long period of time is
a) extinction.
b) cast.
c) evolution.
d) mold.

The longest part of the geologic time scale is
a) the cenozoic era.
b) the mesoszoic era.
c) precambrian time.
d) the paleozoic era.

The earliest life forms on Earth lived
a) on land.
b) in water.
c) in the air.
d) in rocks.

The age of a rock given as the number of years since the rock formed is its
a) absolute age.
b) relative age.
c) unconformity.
d) evolution.

A footprint is a type of a ____ fossil
a) mold
b) cast
c) petrified
d) trace

Why would a jellyfish have very little chance of becoming fossilized?
a) It lives in the sea.
b) It is too small.
c) It has no hard parts.
d) It would go extinct.

The fossil of an organism that covered a wide area but lived for just a short period of time is
a) a trace fossil.
b) an index fossil.
c) a petrified fossil.
d) a preserved fossil.

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