Climate Change Unit Test

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What is climate change?

Back

Climate change refers to significant changes in global temperatures and weather patterns over time, primarily caused by human activities such as burning fossil fuels, deforestation, and industrial processes.

Front

What are greenhouse gases?

Back

Greenhouse gases are gases in Earth's atmosphere that trap heat. The most common greenhouse gases are carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and water vapor.

Front

Why is carbon dioxide a major concern in climate change?

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Carbon dioxide is a major concern because it is the most abundant greenhouse gas emitted by human activities, particularly from burning fossil fuels, and it significantly contributes to global warming.

Front

What is the greenhouse effect?

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The greenhouse effect is the process by which certain gases in Earth's atmosphere trap heat, preventing it from escaping into space, thus warming the planet.

Front

What role do forests play in carbon dioxide levels?

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Forests act as carbon sinks, absorbing carbon dioxide from the atmosphere through photosynthesis, which helps mitigate climate change.

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What is photosynthesis?

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Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy, using carbon dioxide and water to produce glucose and oxygen.

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How do human activities contribute to climate change?

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Human activities contribute to climate change by increasing the concentration of greenhouse gases in the atmosphere through activities like burning fossil fuels, deforestation, and industrial processes.

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What is the correlation between CO2 levels and human activities?

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There is a strong correlation between rising CO2 levels in the atmosphere and human activities, particularly since the Industrial Revolution, indicating that human actions are a primary driver of climate change.

Front

What are carbon sinks?

Back

Carbon sinks are natural systems, such as forests, oceans, and soil, that absorb more carbon dioxide from the atmosphere than they release, helping to reduce the overall concentration of CO2.

Front

What is the impact of methane on climate change?

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Methane is a potent greenhouse gas that is more effective than CO2 at trapping heat in the atmosphere, although it is present in smaller quantities.