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Earth's History Practice Tests

These Grade 8 Science practice tests cover geologic time, fossils, relative and radiometric dating, rock layers, unconformities, plate tectonics, seafloor spreading, past climates, mass extinctions, scientific models, and evidence used to reconstruct Earth's history.

Skills covered

  • Interpreting fossils, sedimentary layers, and the geologic time scale
  • Using relative dating and radioactive decay evidence
  • Explaining plate boundaries, seafloor spreading, and changing continents
  • Inferring past environments and climate from geological evidence
  • Evaluating models, uncertainty, and multiple lines of evidence

How to use these practice tests

Start by identifying the evidence described, such as a fossil, rock layer, map, or measurement. Then determine what the evidence can show about relative order, past conditions, geological processes, or the timing of an event.

For more Grade 8 Science practice, return to the Grade 8 Science category.

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Grade 8 Earths History Practice Tests

Practice Grade 8 Science questions about geologic time, fossils, rock layers, plate tectonics, Earth changes, and evidence of Earths history.

Choose the best answer. Use rock layers, fossils, geological processes, and scientific evidence to interpret events in Earth history.

10 Questions
0/10 Questions0 %
Correct 0
Incorrect 0
Unanswered 10
1. QuestionMultiple choice

What can a coal layer in a region that is now cold and dry suggest?

Please select an answer first.

Correct answer: A

The correct answer is The region once had a warmer, wetter environment with abundant plant material..

  1. Identify the evidence: Determine whether the question uses fossils, rocks, layers, geological time, or a model of Earth history.
  2. Connect the evidence to time: Coal forms from buried plant material under conditions that can differ from the regions present climate.
  3. Check the conclusion: The correct choice is The region once had a warmer, wetter environment with abundant plant material..

Coal forms from buried plant material under conditions that can differ from the regions present climate.

2. QuestionMultiple choice

What does a sequence of undisturbed sedimentary layers allow scientists to infer?

Please select an answer first.

Correct answer: B

The correct answer is The relative order in which the layers were deposited.

  1. Identify the evidence: Determine whether the question uses fossils, rocks, layers, geological time, or a model of Earth history.
  2. Connect the evidence to time: Superposition provides a relative sequence, while other evidence is needed for numerical ages.
  3. Check the conclusion: The correct choice is The relative order in which the layers were deposited.

Superposition provides a relative sequence, while other evidence is needed for numerical ages.

3. QuestionMultiple choice

A fossil in Layer X is below a fossil in Layer Y, and the layers are undisturbed. Which inference is reasonable?

Please select an answer first.

Correct answer: C

The correct answer is The organism in Layer X lived before the organism represented in Layer Y..

  1. Identify the evidence: Determine whether the question uses fossils, rocks, layers, geological time, or a model of Earth history.
  2. Connect the evidence to time: In an undisturbed sequence, lower layers were deposited earlier than layers above them.
  3. Check the conclusion: The correct choice is The organism in Layer X lived before the organism represented in Layer Y..

In an undisturbed sequence, lower layers were deposited earlier than layers above them.

4. QuestionMultiple choice

What can a sharp boundary between two rock layers indicate?

Please select an answer first.

Correct answer: D

The correct answer is A significant change in deposition or environment between the layers.

  1. Identify the evidence: Determine whether the question uses fossils, rocks, layers, geological time, or a model of Earth history.
  2. Connect the evidence to time: A boundary can mark a change in conditions, an interruption in deposition, or another important geological event.
  3. Check the conclusion: The correct choice is A significant change in deposition or environment between the layers.

A boundary can mark a change in conditions, an interruption in deposition, or another important geological event.

5. QuestionMultiple choice

Which plate interaction is most likely to produce a long mountain range?

Please select an answer first.

Correct answer: A

The correct answer is The collision of two continental plates.

  1. Identify the evidence: Determine whether the question uses fossils, rocks, layers, geological time, or a model of Earth history.
  2. Connect the evidence to time: Continental collision compresses and uplifts crust, which can build extensive mountain ranges.
  3. Check the conclusion: The correct choice is The collision of two continental plates.

Continental collision compresses and uplifts crust, which can build extensive mountain ranges.

6. QuestionMultiple choice

Why is a fossilized fish found in a rock layer useful evidence?

Please select an answer first.

Correct answer: B

The correct answer is It can reveal that the environment once supported aquatic life..

  1. Identify the evidence: Determine whether the question uses fossils, rocks, layers, geological time, or a model of Earth history.
  2. Connect the evidence to time: The organism and the surrounding rock can provide clues about the past environment and relative timing.
  3. Check the conclusion: The correct choice is It can reveal that the environment once supported aquatic life..

The organism and the surrounding rock can provide clues about the past environment and relative timing.

7. QuestionMultiple choice

How can knowledge of plate boundaries help communities?

Please select an answer first.

Correct answer: C

The correct answer is It can help identify areas with greater risks of earthquakes, volcanoes, or mountain building..

  1. Identify the evidence: Determine whether the question uses fossils, rocks, layers, geological time, or a model of Earth history.
  2. Connect the evidence to time: Plate-boundary patterns help scientists assess geological hazards and support safer planning.
  3. Check the conclusion: The correct choice is It can help identify areas with greater risks of earthquakes, volcanoes, or mountain building..

Plate-boundary patterns help scientists assess geological hazards and support safer planning.

8. QuestionMultiple choice

Why do scientists compare old maps and current maps when studying Earth history?

Please select an answer first.

Correct answer: D

The correct answer is The comparison can reveal changes in coastlines, continents, and environments over time..

  1. Identify the evidence: Determine whether the question uses fossils, rocks, layers, geological time, or a model of Earth history.
  2. Connect the evidence to time: Maps from different times can show how land, oceans, and geological features have changed.
  3. Check the conclusion: The correct choice is The comparison can reveal changes in coastlines, continents, and environments over time..

Maps from different times can show how land, oceans, and geological features have changed.

9. QuestionMultiple choice

What should scientists do when new fossil evidence conflicts with an older model?

Please select an answer first.

Correct answer: A

The correct answer is Reevaluate and revise the model using the new evidence..

  1. Identify the evidence: Determine whether the question uses fossils, rocks, layers, geological time, or a model of Earth history.
  2. Connect the evidence to time: Scientific explanations are updated when reliable new evidence provides a better fit.
  3. Check the conclusion: The correct choice is Reevaluate and revise the model using the new evidence..

Scientific explanations are updated when reliable new evidence provides a better fit.

10. QuestionMultiple choice

Which statement best summarizes how scientists study Earths history?

Please select an answer first.

Correct answer: B

The correct answer is They use rocks, fossils, measurements, models, and patterns from many locations to reconstruct past events..

  1. Identify the evidence: Determine whether the question uses fossils, rocks, layers, geological time, or a model of Earth history.
  2. Connect the evidence to time: Earth history is reconstructed by combining many types of evidence and testing explanations against observed patterns.
  3. Check the conclusion: The correct choice is They use rocks, fossils, measurements, models, and patterns from many locations to reconstruct past events..

Earth history is reconstructed by combining many types of evidence and testing explanations against observed patterns.

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