Understanding Geologic Time

Which fossil is an impression left by the original organism?

• cast
• mold
• trace
• preserved remains

The Geologic Time Scale is a record of what?

• old geologists
• sweet geology music
• the known history of rocks and fossils
• a list of every living thing ever

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

The Law of Superposition helps scientists to determine what?

• The absolute age of rock layers
• The age of fossils
• The relative age of rock layers
• the super powers of rocks

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