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Fossils are always the remains of an organism's body.

Fossils are just old bones or pieces of plants.

Fossils are clues to ancient life and environments.

Fossils cannot tell us about past environments.

A mark made by pressing on a surface

A type of fossil

A type of rock

A type of leaf

They form quickly

They form over a long time

They are always horizontal

They are always vertical

At the top

In the middle

At the bottom

It varies

Snails

Sea urchins

Mussels

Clams

The environment changed from desert to ocean or vice versa over time.

The fossils were placed there by early humans.

The fossils must have come from the same time period.

The sea creature fossils were brought in by modern animals.

Different parts of the region had different landscapes in the past.