Greenhouse effect

Definition

The greenhouse effect is the process by which certain gases in a planet's atmosphere trap heat, leading to an increase in surface temperatures. These gases allow sunlight to enter but prevent some of the resulting heat from escaping back into space.

5 Must Know Facts For Your Next Test

1. Earth's greenhouse effect is essential for maintaining temperatures that support life.
2. Venus experiences an extreme greenhouse effect, causing surface temperatures high enough to melt lead.
3. Carbon dioxide (CO2) is a major greenhouse gas on both Earth and Venus.
4. Mars has a thin atmosphere with a weak greenhouse effect, leading to very cold surface temperatures.
5. Human activities have increased the concentration of greenhouse gases on Earth, contributing to climate change.

Review Questions

• What role does carbon dioxide play in the greenhouse effect on Venus?
• How does the greenhouse effect differ between Earth and Mars?
• Why is the greenhouse effect important for sustaining life on Earth?

Related terms

Climate Change: Long-term alteration of temperature and typical weather patterns in a place, often linked to increased levels of atmospheric CO2.

Atmospheric Composition:

The mixture of gases that make up a planet's atmosphere, influencing its climate and environmental conditions.

Radiative Forcing: The change in energy flux in the atmosphere due to changes in factors like greenhouse gas concentrations or solar radiation.