Fossils and Geologic Time Scale

_______________ is the long span of time that begins geologic time.

• Precambrian Time
• Cenozoic Time

A unit of geologic time that subdivides eras

• period
• time span

___________ a record of the geologic events and the evolution of life forms as shown in the fossil record. 

• Eras
• Geologic Time Scale

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

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

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 fossil is an impression left by the original organism?

• cast
• mold
• trace
• preserved remains

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

• cast
• mold
• trace
• preserved remains

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

• cast
• mold
• trace
• preserved remains

What is a fossil that is useful for dating and correlating the strata in which it is found?

• a petrified fossil
• a trace fossil
• a cast fossil
• an index fossil