Geologic time scale

Which fossil is a replica of the original shape of the organism?

• cast
• mold
• trace
• preserved remains

Which fossil is an impression left by the original organism?

• cast
• mold
• trace
• preserved remains

Relative dating of rock layers tells us that the deeper we dig, _______.

• the younger the rocks get
• the smellier the rocks get
• the harder the rocks get
• the older the rocks get

Which of the following statements about the fossil record is true?

• all organisms become fossils
• organisms having soft body parts make up most of the fossils
• all organisms that have shells become fossils
• the fossil record is incomplete

A scientist who studies fossils is called a what?

• Fossilologist
• Rock Hound
• Archeologist
• Paleontologist

How old do Paleontologists believe the Earth is?

• 2015 years old
• 3.6 billion years old
• 4.6 billion years old
• 4.6 million years old

A bug stuck in amber is an example of what type of fossil?

• cast
• mold
• trace
• preserved remains

What type of rock do fossils form in?

• Igneous
• Sedimentary
• Metamorphic
• Classic

According to the law of superposition, which layer is the youngest?

• A
• B
• C

Why is the fossil record incomplete?

• fossils get eroded away over time
• most organisms never became fossils
• scavengers and decomposers eat them too quickly
• all of the above