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Climate and Human Impact Practice Tests

These Grade 8 Science practice tests cover weather and climate, Earth's energy balance, the greenhouse effect, the water and carbon cycles, human activities, climate evidence, ecosystem impacts, adaptation, mitigation, and engineering solutions.

Skills covered

  • Distinguishing short-term weather from long-term climate patterns
  • Explaining greenhouse gases, energy balance, and carbon-cycle processes
  • Interpreting climate data, graphs, proxies, and multiple lines of evidence
  • Connecting human activities to ecosystem and community impacts
  • Comparing mitigation, adaptation, and evidence-based design choices

How to use these practice tests

Identify whether each question is about a climate process, a human activity, evidence, an impact, or a response. Then connect the claim to data, a model, or a clearly described cause-and-effect relationship.

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

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Grade 8 Climate and Human Impact Practice Tests

Practice Grade 8 Science questions about weather and climate, the greenhouse effect, carbon cycles, human activities, climate evidence, impacts, and solutions.

Choose the best answer. Use climate data, energy balance, carbon-cycle ideas, and evidence-based reasoning to evaluate each situation.

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

How can burning coal, oil, and natural gas affect atmospheric carbon dioxide?

Please select an answer first.

Correct answer: A

The correct answer is It can increase carbon dioxide because stored carbon is released during combustion..

  1. Identify the climate system: Determine whether the question concerns weather, climate, energy balance, carbon, human impact, or a response strategy.
  2. Use the evidence: Combustion transfers carbon stored in fossil fuels into the atmosphere as carbon dioxide.
  3. Check the conclusion: The correct choice is It can increase carbon dioxide because stored carbon is released during combustion..

Combustion transfers carbon stored in fossil fuels into the atmosphere as carbon dioxide.

2. QuestionMultiple choice

How do plants remove carbon dioxide from the atmosphere?

Please select an answer first.

Correct answer: B

The correct answer is They use carbon dioxide during photosynthesis..

  1. Identify the climate system: Determine whether the question concerns weather, climate, energy balance, carbon, human impact, or a response strategy.
  2. Use the evidence: Photosynthesis uses carbon dioxide and water to make food, storing carbon in plant matter.
  3. Check the conclusion: The correct choice is They use carbon dioxide during photosynthesis..

Photosynthesis uses carbon dioxide and water to make food, storing carbon in plant matter.

3. QuestionMultiple choice

What happens to carbon when organisms respire?

Please select an answer first.

Correct answer: C

The correct answer is Some carbon is returned to the atmosphere as carbon dioxide..

  1. Identify the climate system: Determine whether the question concerns weather, climate, energy balance, carbon, human impact, or a response strategy.
  2. Use the evidence: Cellular respiration releases carbon dioxide as organisms obtain energy from food.
  3. Check the conclusion: The correct choice is Some carbon is returned to the atmosphere as carbon dioxide..

Cellular respiration releases carbon dioxide as organisms obtain energy from food.

4. QuestionMultiple choice

How can deforestation affect the carbon cycle?

Please select an answer first.

Correct answer: D

The correct answer is It can reduce carbon storage in plants and release stored carbon when trees are burned or decay..

  1. Identify the climate system: Determine whether the question concerns weather, climate, energy balance, carbon, human impact, or a response strategy.
  2. Use the evidence: Removing forests changes carbon storage and can increase atmospheric carbon dioxide.
  3. Check the conclusion: The correct choice is It can reduce carbon storage in plants and release stored carbon when trees are burned or decay..

Removing forests changes carbon storage and can increase atmospheric carbon dioxide.

5. QuestionMultiple choice

Which human activity can add excess nutrients to a lake?

Please select an answer first.

Correct answer: A

The correct answer is Fertilizer runoff from farms.

  1. Identify the climate system: Determine whether the question concerns weather, climate, energy balance, carbon, human impact, or a response strategy.
  2. Use the evidence: Rain can carry fertilizer nutrients into waterways, where excess nutrients may cause algal growth and oxygen loss.
  3. Check the conclusion: The correct choice is Fertilizer runoff from farms.

Rain can carry fertilizer nutrients into waterways, where excess nutrients may cause algal growth and oxygen loss.

6. QuestionMultiple choice

What is one effect of excess nutrient pollution in water?

Please select an answer first.

Correct answer: B

The correct answer is Algal blooms can reduce dissolved oxygen when the algae decompose..

  1. Identify the climate system: Determine whether the question concerns weather, climate, energy balance, carbon, human impact, or a response strategy.
  2. Use the evidence: Decomposition of large algal growths can use oxygen and create conditions that harm aquatic organisms.
  3. Check the conclusion: The correct choice is Algal blooms can reduce dissolved oxygen when the algae decompose..

Decomposition of large algal growths can use oxygen and create conditions that harm aquatic organisms.

7. QuestionMultiple choice

How can burning gasoline affect air quality?

Please select an answer first.

Correct answer: C

The correct answer is It can release pollutants and greenhouse gases into the atmosphere..

  1. Identify the climate system: Determine whether the question concerns weather, climate, energy balance, carbon, human impact, or a response strategy.
  2. Use the evidence: Combustion can release carbon dioxide and other pollutants that affect air quality and climate.
  3. Check the conclusion: The correct choice is It can release pollutants and greenhouse gases into the atmosphere..

Combustion can release carbon dioxide and other pollutants that affect air quality and climate.

8. QuestionMultiple choice

What is one benefit of restoring wetlands?

Please select an answer first.

Correct answer: D

The correct answer is Wetlands can store carbon, filter water, and provide habitat..

  1. Identify the climate system: Determine whether the question concerns weather, climate, energy balance, carbon, human impact, or a response strategy.
  2. Use the evidence: Healthy wetlands provide several ecosystem services, including water filtration, carbon storage, and habitat.
  3. Check the conclusion: The correct choice is Wetlands can store carbon, filter water, and provide habitat..

Healthy wetlands provide several ecosystem services, including water filtration, carbon storage, and habitat.

9. QuestionMultiple choice

Why can urban areas become warmer than nearby rural areas?

Please select an answer first.

Correct answer: A

The correct answer is Buildings and pavement absorb and re-emit heat, while cities may have less vegetation..

  1. Identify the climate system: Determine whether the question concerns weather, climate, energy balance, carbon, human impact, or a response strategy.
  2. Use the evidence: The urban heat island effect is influenced by heat-absorbing surfaces, reduced vegetation, and human energy use.
  3. Check the conclusion: The correct choice is Buildings and pavement absorb and re-emit heat, while cities may have less vegetation..

The urban heat island effect is influenced by heat-absorbing surfaces, reduced vegetation, and human energy use.

10. QuestionMultiple choice

How can reducing food waste help lower human environmental impact?

Please select an answer first.

Correct answer: B

The correct answer is It reduces wasted resources and emissions associated with producing and transporting unused food..

  1. Identify the climate system: Determine whether the question concerns weather, climate, energy balance, carbon, human impact, or a response strategy.
  2. Use the evidence: Using food efficiently reduces the energy, land, water, and emissions connected with food that would otherwise be discarded.
  3. Check the conclusion: The correct choice is It reduces wasted resources and emissions associated with producing and transporting unused food..

Using food efficiently reduces the energy, land, water, and emissions connected with food that would otherwise be discarded.

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