The Greenhouse Effect
Greenhouse gases trap heat in the atmosphere, keeping Earth warm enough for life, but more gases cause extra warming.
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Play with the controls to see the idea in action.
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Greenhouse gases trap heat in the atmosphere, keeping Earth warm enough for life, but more gases cause extra warming.
- Carbon dioxide, methane and water vapour
- Natural effect keeps Earth at about 15 degrees
- Human emissions strengthen it
🧠 Quick quiz
Three questions. Score 2 or more to complete the topic.
What is The Greenhouse Effect?
Within Earth & Environmental Science, which covers our planet, its resources and ecosystems, and how people can protect the environment, this topic explains The Greenhouse Effect. Earth and environment topics show how the planet’s systems shape landscapes, climate and life, with models that make these processes visible.
Check that you can explain The Greenhouse Effect in your own words and give one example from everyday life. If you can do that, you have understood the core idea.
Understanding The Greenhouse Effect helps you explain the environment around you and weigh up how people can protect it.
The Greenhouse Effect in detail
The greenhouse effect is the natural warming of Earth's surface. Short-wave radiation from the Sun passes through the atmosphere and warms the ground, which then emits long-wave infrared radiation. Greenhouse gases, such as water vapour, carbon dioxide, methane and nitrous oxide, absorb some of this and re-radiate it in all directions, including back to the surface.
Without this, Earth's average temperature would be about −18 °C instead of about 15 °C. The problem is the enhanced greenhouse effect: human activities have increased the amounts of these gases, trapping more heat. Different gases have different warming potential, with methane trapping more heat per molecule than carbon dioxide but staying in the air for less time.
How the interactive helps you understand The Greenhouse Effect
Watch the Earth model in the interactive. Use any sliders or buttons it offers to change the values and see how the Earth model responds.
Before you change anything, predict the result. Then change one value at a time and check whether your prediction was right. This is a quick way to build a correct mental model of The Greenhouse Effect.
Real-life uses and examples
- Explain how The Greenhouse Effect affects the landscape or climate near you.
- Link The Greenhouse Effect to a real environmental problem and a possible solution.
- Use a diagram of The Greenhouse Effect to describe the steps of a process in order.
Common mistakes to avoid
- Describing a process without the timescale it works over.
- Presenting one cause as the only cause of an environmental change.
- Learning the definition without testing it. Use the quiz and the interactive to check that you can apply the idea.
Frequently asked questions about The Greenhouse Effect
What is The Greenhouse Effect?
Greenhouse gases trap heat in the atmosphere, keeping Earth warm enough for life, but more gases cause extra warming.
What are the most important points about The Greenhouse Effect?
The main points are: Carbon dioxide, methane and water vapour; Natural effect keeps Earth at about 15 degrees; Human emissions strengthen it.
Why is The Greenhouse Effect useful?
Understanding The Greenhouse Effect helps you explain the environment around you and weigh up how people can protect it.
How can I practise The Greenhouse Effect?
Open the interactive at the top of this page and change the controls one at a time. Predict the result before each change, then take the three-question quiz. A score of two or more marks the topic as complete on this device.
Which topics are related to The Greenhouse Effect?
Related topics in Earth & Environmental Science include Mitigation and Adaptation, Ocean Currents and Climate, Water Conservation.