Geo Time scale part 1

The entire history of the Earth can be divided into the Precambrian (ancient) Eon and the Phanerozoic (current) Eon. Which of the following correctly represents the percent of Earth's history occupied by each?

• 88% Precambrian, 12% Phanerozoic

• 12% Precambrian, 88% Phanerozoic

• 81% Precambrian, 19% Phanerozoic

• 19% Precambrian, 81% Phanerozoic

Earth’s most primitive life forms are represented by:

• prokaryotic cells.

• plants.

• fungi.

• tube worms.

Which period are we currently in?

• Quaternary
• Holocene
• Jurassic
• Tertiary

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 segment of time is the smallest?

• Eon

• Era

• Period

• Epoch

Jellyfish are one of the oldest species on Earth. In what time period does science say they first appear?

• Precambrian Era

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

According to the text if time were like a clock, humans would have shown up at ​ (a)   on Earth.​

• 11:58:43
• 11:38:34
• 10:58: 22
• 12:00:00
• 1:10:56

a model scientists use to describe the timing of events and the relationships between those events in earth’s history.

• geologic time scale

• era

• period

• epoch

The disappearance of a species.

• Evolution
• Extinction
• Migration
• Mutation

In which time period are we currently living?

• Precambrian Time

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era