Geologic Time

Which era was the longest, taking up 88% of geologic time?

• Precambrian

• Paleozoic

• Mesozoic

• Cenozoic

Dinosaurs, small mammals, and birds are found in this time period.

• Precambrian

• Paleozoic

• Mesozoic

• Cenozoic

The end of life for a group of organisms, usually a species, is called a

• wipeout

• mass extinction

• meteorite

• dying off

Jellyfish are one of the oldest species on Earth. In what period did they first appear then?

• Precambrian

• Paleozoic

• Mesozoic

• Cenozoic

What was the existence of dinosaurs closer to?

• our day

• the creation of Earth

Saying you are older than your sister is an example of......

• absolute age

• relative age

A trend we see in the geologic time scale is that fossils become more ........over time.

• complex

• simple

• heavy

• purple

What era occurred last (most recent)?

• Cenozoic

• Mesozoic

• Paleozoic

Which era are we currently in?

• Mesozoic

• Paleozoic

• Cenozoic

• Precambrian

What are fossils that are abundant, easily recognizable, short lived, and widespread called?

• preserved fossils

• index fossils

• imprints

• radioactive dating