###IMPROVE GRADE ASSIGNMENT QUIZZZ 5

Earth is _______ years old

• 3 billion

• 4.6 billion

• 4.6 million

• 567 million

Mammals were dominant in which era?

• Paleozoic

• Cenozoic

• Mesozoic

• Precambrian

Which is the longest time period in the geologic time scale

• Period

• Epoch

• Era

• Eon

What are the four eras in order from oldest to youngest?

• Precambrian, Paleozoic, Mesozoic, Cenozoic

• Precambrian, Mesozoic, Paleozoic, Cenozoic

• Cenozoic, Mesozoic, Paleozoic, Precambrian

• Mesozoic, Precambrian, Cenozoic, Paleozoic

What era are we currently in?

• Mesozoic

• Cenozoic

• Paleozoic

• Precambrian

What happened during the "Cambrian explosion"

• An asteroid caused a mass extinction

• Mammals began to dominate the Earth

• This is when there was a major increase in the number and diversity of invertebrate species in a short period of time.

Which came first?

• Trilobites are one of the dominant species on Earth

• Amphibians leave the water

• The age of reptiles

• Early humans arise on Earth

Which Layer is the oldest?

• A

• X

• G

• Z

Which layer is the youngest?

• Z

• D

• W

• A

A fossil is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood, oil, coal, and DNA remnants. Select True.

• True

• False