Geologic Time

This was known as the era of the amphibians.

• cenozoic
• mesozoic
• paleozoic
• precambrian

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

This provides information about the history of life on earth and how organisms lived and evolved over time.

• fossil data
• fossil evidence
• fossil  record
• remains of fossil

The disappearance of a species.

• Evolution
• Extinction
• Migration
• Mutation

Known as the age of the mammals?

• Mesozoic Era
• Holocene Epoch
• Cenozoic Era
• Cambrian

The dinosaurs and reptiles were dominant in which Era?

• Precambrian
• Mesozoic
• Paleozoic
• Cenozoic

What occurred during the Paleozoic Era?

• a great number of organisms evolved
• mammals evolved         
• reptiles spread widely 

Scientists chose where units of geologic time began and ended based on major changes in life forms at certain times.

• true
• false

Paleozoic, Mesozoic & Cenozoic are all

• Epochs
• Eras
• Periods
• Eons

Which type of dating method can be used on rock layers by applying the Law of Superposition?

• relative dating
• absolute dating
• radioactive dating
• radiometric dating