Geologic Time

Question 1

Study the geologic time scale.The Eocene period exists in Earth’s history around 34 MYA. What could a scientist do to determine what era the Eocene period belongs to on the geologic time scale?

Revolt · Accepted Answer

study information related to the Cenozoic era

Question 2

Study the graph about oxygen content of Earth’s atmosphere.Which describes oxygen content as Earth evolved over time?

Revolt · Accepted Answer

Oxygen levels stay above 15 percent starting 200 million years ago

Question 3

Which unit of geologic time is the oldest?

Revolt · Accepted Answer

Precambrian

Question 4

What is the purpose of a geological time scale ?

Revolt · Accepted Answer

It is used to present the correct sequence of events in the Earth’s history.

Question 5

Study the image about geologic time.

Revolt · Accepted Answer

Quaternary

Question 6

Which best explains how the collisions of materials in space contribute to the formation of layers in protoplanets?

Revolt · Accepted Answer

The collisions release heat, which results in the heating and subsequent melting, sinking, and rising of materials.

Question 7

Which unit of geologic time began 65.5 million years ago and continues to the present?

Revolt · Accepted Answer

Cenozoic era

Question 8

Which evidence is most likely used to indicate the beginning of solar system formation?

Revolt · Accepted Answer

Materials were pulled together by gravity.

Question 9

Study this image of a geologic time scale.

Revolt · Accepted Answer

520 million years ago

Question 10

The table shows index fossils.

Revolt · Accepted Answer

Life forms existed during the Cambrian period.

Geologic Time Answers

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