Geologic Time

Question 1

Which period is older than the Triassic period?

Revolt · Accepted Answer

Cambrian

Question 2

Which process contributes to the formation of layers in protoplanets when unstable elements release particles and energy?

Revolt · Accepted Answer

radioactive decay

Question 3

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 4

Study the image.8307-06-05-10.jpg

Revolt · Accepted Answer

The first flowering plants were introduced toward the end of the Mesozoic era.

Question 5

Why is radioactive dating important when approximating the age of Earth?

Revolt · Accepted Answer

Scientists can determine the order of when rocks formed on Earth.

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

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 8

Which best explains how gravity contributes to the formation of layers in protoplanets?

Revolt · Accepted Answer

Gravity attracts materials and causes compaction, which produces heat and leads to the melting, sinking, and rising of materials.

Question 9

What does the geologic time scale confirm about the Cretaceous period?

Revolt · Accepted Answer

It ended during the Mesozoic era.

Question 10

Study this image of a geologic time scale.

Revolt · Accepted Answer

520 million years ago

Geologic Time Answers

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