6th Grade Chapter 4

A trace fossil is a hollow area in sediment in the shape of an organism or part of an organism.

• True

• False

A solid copy of the shape of an organism is called a

• mold

• carbon film

• cast

• fossil record

What type of fossils provide evidence of the activities of ancient organisms?

• molds and casts

• petrified fossils

• trace fossils

• carbon films

Which substance is not able to preserve entire organisms?

• sticky tar

• water

• amber

• ice

Most fossils form when living things die and are buried by _________________________ that hardens into rock over time.

• fossil record

• mold

• cast

• sediment

A __________________________ is an extremely thin coating of carbon on rock.

• ice

• amber

• carbon film

• sediment

Scientists who study fossils.

• geologists

• paleontologists

• biologists

• chemists

Scientists study the ___________________________ to learn about the history of life, past environments on Earth, and how different groups of organisms have changed over time.

• superposition

• intrusion

• extrusion

• fossil record

What is referred to as the gradual change in living things over long periods of time.

• evolution

• extinction

• intrusion

• fossils

If an organism no longer exists on Earth, it is considered

• endangered

• absent

• missing

• extinct