# Geologic Time Scale Test! Trivia Quiz

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Cara Rocchi
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If you want a geologic time scale test, this trivia quiz is exactly what you need. The earth has undergone a lot of changes since it was formed and a person who is well capable of telling you about this changes needs to have a proper understanding of time scales and events associated with them. Are you this type of person? Take up the quiz and keep a yes in mind if you get to answer all the questions right.

• 1.

### All of the following show examples of relative ages EXCEPT:

• A.

Melissa is much older than Scott.

• B.

Rachel is younger than Wes, but the same age as Donna.

• C.

Sara is several years younger than Anthony.

• D.

Tommy is 10 years old.

D. Tommy is 10 years old.
Explanation
Relative age is a comparison of one object to another.

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• 2.

### An extrusion occurs when ____________ hardens on the Earth’s surface.

• A.

The remains of an organism.

• B.

Lava

• C.

Magma

• D.

Fossils

B. Lava
Explanation
Extrusions are magma that reaches the surface of the Earth, therefore becoming lava.

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• 3.

### In the picture, the arrow is pointing to a(n):

• A.

Fault

• B.

Unconformity

• C.

Intrusion

• D.

Extrusion

C. Intrusion
Explanation
The arrow is pointing to magma that cuts through the rocks but does not reach the surface of the earth.

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• 4.

### Layer I is the oldest rock layer. Which geologic principle verifies this information?

• A.

Principle of Horizontality

• B.

Principle of Superposition

• C.

Principle of Extrusion

• D.

Principle of Inclusion

B. Principle of Superposition
Explanation
The Principle of Superposition states that in layers of undisturbed sedimentary rocks, the layer on the bottom is the oldest and layers above are progressively younger.

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• 5.

### List the layers and geologic processes from oldest to youngest.

• A.

B, I, F, H, R, M

• B.

R, M, H, F, B, I

• C.

I, B, F, M, H, R

• D.

H, R, M, F, B, I

C. I, B, F, M, H, R
Explanation
The bottom layer is the oldest, the top layer is the youngest. Anything that cuts in front of rock layers is younger than the layers it cuts.

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• 6.

### A gap in the geologic record that formed when sedimentary rocks cover an eroded surface is called:

• A.

Intrusion

• B.

Unconformity

• C.

Fault

• D.

Extrusion

B. Unconformity
Explanation
Unconformities are the result of layers of rock being eroded away and covered by other layers.

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• 7.

### The geologic time scale is divided into _______________ based on changes in flora and fauna:

• A.

Relative ages

• B.

Absolute ages

• C.

Unconformities

• D.

Eras and periods

D. Eras and periods
Explanation
Based on the fossil record, organisms have changed throughout Earth's history. These changes are represented in the Geologic Time Scale.

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• 8.

### Scratches and scouring in rocks is most likely evidence of which geologic event?

• A.

Volcano

• B.

Meteorite

• C.

Flood

• D.

Ice Age

D. Ice Age
Explanation
Scratches in rocks can be evidence of a glacier moving through the area.

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• 9.

### Many scientists believe that the extinction of the dinosaurs was mostly the result of a meteorite hitting the Earth. What evidence supports this theory?

• A.

Large crater found in Mexico.

• B.

Samples of dinosaur lungs in fossils.

• C.

Existence of insects during the Triassic period.

• D.

Fossils found in the top layer of the Grand Canyon.

A. Large crater found in Mexico.
Explanation
Rock samples in the crater date back to the same period as dinosaurs.

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• 10.

### Which of the following would NOT be evidence of an Ice Age?

• A.

Rock scouring

• B.

Valley formation

• C.

Carbon dioxide in ice core samples

• D.

Moraines

C. Carbon dioxide in ice core samples
Explanation
Carbon dioxide can be found in call ice core samples. The amount of carbon dioxide provides evidence about Earth's past.

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• Current Version
• Jul 25, 2024
Quiz Edited by
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• Jan 18, 2016
Quiz Created by
Cara Rocchi