Fossils / Changes to Earth's Surface

Front

What is a cast fossil?

Back

A cast fossil is formed when a mold is filled with minerals or sediments, creating a replica of the original organism.

Front

What is a glacier?

Back

A glacier is a large mass of snow and ice that moves slowly over land.

Front

What is glacial till?

Back

Glacial till is rock debris that is carried and deposited by a glacier.

Front

What is a moraine?

Back

A moraine is a landform made of debris that has been pushed or deposited by a glacier.

Front

What part of an animal's body is least likely to become a fossil?

Back

The skin is the part of an animal's body that is least likely to become a fossil.

Front

What is gravity?

Back

Gravity is the force that causes materials to move from a higher place to a lower place.

Front

What is a mold fossil?

Back

A mold fossil is an impression left in sediment when an organism decays, creating a cavity in the shape of the organism.

Front

What is a trace fossil?

Back

A trace fossil is a type of fossil that shows the activity of an organism, such as footprints or burrows.

Front

What is the difference between a mold and a cast fossil?

Back

A mold fossil is an impression of an organism, while a cast fossil is a replica formed when the mold is filled.

Front

What is erosion?

Back

Erosion is the process by which soil and rock are removed from the Earth's surface by wind, water, or ice.