When a plant or animal no longer exists, it is ____________________.

• fossil
• imprint
• extinct
• cast

What is hardened tree sap called?

• coprolites
• index fossils
• gastroliths
• amber

How are fossils created?

• Traces of organisms get turned into stone.
• Dead organisms are quickly buried for millions of years.
• Animals get trapped.
• All of the above

Because this fossil shows the activity of walking, it could be classified as

• trace fossil
• cast fossil
• carbon film fossil
• preserved 

A hollow space in rock in the shape of an organism. 

• Mold fossil
• Cast fossil
• Body fossil
• Trace fossil

These fossils shows evidence of activity. Scientists use these fossils to study animal behaviors. 

• Mold fossil
• Trace Fossil
• Cast fossil
• Body Fossil

Which type of fossil is pictured?

• Mold
• Cast
• Trace
• Body

What can be learned about a fossil using relative-age dating?

• its age in years
• its age compared to other fossils
• its age based on radioactive decay

What is a major cause of extinctions?

• biological evolution
• environmental change
• carbonization
• mineralization

The impression of an organism in a rock

• cast
• original material fossil
• trace fossil
• mold