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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 layer of volcanic ash between sedimentary layers help scientists determine?

Please select an answer first.

Correct answer: A

The correct answer is A time marker for comparing events in different locations.

  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 widespread ash layer formed during one eruption can act as a recognizable marker in the rock record.
  3. Check the conclusion: The correct choice is A time marker for comparing events in different locations.

A widespread ash layer formed during one eruption can act as a recognizable marker in the rock record.

2. QuestionMultiple choice

What can ice cores reveal about past environments?

Please select an answer first.

Correct answer: B

The correct answer is Trapped gases and particles that provide clues about past climate.

  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: Ice layers can preserve trapped gases and particles that help reconstruct past atmospheric and climate conditions.
  3. Check the conclusion: The correct choice is Trapped gases and particles that provide clues about past climate.

Ice layers can preserve trapped gases and particles that help reconstruct past atmospheric and climate conditions.

3. QuestionMultiple choice

How can fossil pollen help scientists study Earth history?

Please select an answer first.

Correct answer: C

The correct answer is It can provide evidence about past plants and climate conditions..

  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: Pollen preserved in sediments can indicate which plants lived in an area and what conditions they preferred.
  3. Check the conclusion: The correct choice is It can provide evidence about past plants and climate conditions..

Pollen preserved in sediments can indicate which plants lived in an area and what conditions they preferred.

4. QuestionMultiple choice

What is a mass extinction?

Please select an answer first.

Correct answer: D

The correct answer is A time when many species disappear over a relatively short geologic interval.

  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: Mass extinction events involve a large loss of species across many environments in a geologically short time.
  3. Check the conclusion: The correct choice is A time when many species disappear over a relatively short geologic interval.

Mass extinction events involve a large loss of species across many environments in a geologically short time.

5. QuestionMultiple choice

Which statement compares gradual and sudden geological change?

Please select an answer first.

Correct answer: A

The correct answer is Some changes accumulate slowly, while others can happen rapidly during events such as eruptions or impacts..

  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 includes both gradual processes and rapid events, and evidence can record both.
  3. Check the conclusion: The correct choice is Some changes accumulate slowly, while others can happen rapidly during events such as eruptions or impacts..

Earth history includes both gradual processes and rapid events, and evidence can record both.

6. QuestionMultiple choice

What can a thick layer of sediment deposited by a flood suggest?

Please select an answer first.

Correct answer: B

The correct answer is A rapid change in the environment at that 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: A distinctive deposit can record a sudden event such as a flood and help reconstruct the past environment.
  3. Check the conclusion: The correct choice is A rapid change in the environment at that time.

A distinctive deposit can record a sudden event such as a flood and help reconstruct the past environment.

7. QuestionMultiple choice

What can changes in fossilized sea life found far inland suggest?

Please select an answer first.

Correct answer: C

The correct answer is The area may once have been covered by a sea or had a different environment..

  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: Marine fossils on land can indicate that the region was once underwater or later changed through uplift and sea-level shifts.
  3. Check the conclusion: The correct choice is The area may once have been covered by a sea or had a different environment..

Marine fossils on land can indicate that the region was once underwater or later changed through uplift and sea-level shifts.

8. QuestionMultiple choice

What is a climate proxy?

Please select an answer first.

Correct answer: D

The correct answer is An indirect piece of evidence used to infer past climate conditions.

  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: Tree rings, ice cores, pollen, and other proxies preserve patterns that can be used to infer past climate.
  3. Check the conclusion: The correct choice is An indirect piece of evidence used to infer past climate conditions.

Tree rings, ice cores, pollen, and other proxies preserve patterns that can be used to infer past climate.

9. QuestionMultiple choice

What can fossilized coral reefs indicate about an ancient location?

Please select an answer first.

Correct answer: A

The correct answer is The area once had warm, shallow marine conditions suitable for coral..

  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: Coral reefs generally require particular warm, shallow-water conditions, so fossil coral can reveal an earlier marine environment.
  3. Check the conclusion: The correct choice is The area once had warm, shallow marine conditions suitable for coral..

Coral reefs generally require particular warm, shallow-water conditions, so fossil coral can reveal an earlier marine environment.

10. QuestionMultiple choice

What does uniformitarianism suggest?

Please select an answer first.

Correct answer: B

The correct answer is The same natural processes observed today have also acted over long periods of Earth history..

  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: Uniformitarianism uses present-day processes as evidence for understanding how gradual geological changes occurred in the past.
  3. Check the conclusion: The correct choice is The same natural processes observed today have also acted over long periods of Earth history..

Uniformitarianism uses present-day processes as evidence for understanding how gradual geological changes occurred in the past.

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