The Greenhouse Effect

Mr. Andersen explains the greenhouse effect, its necessity for life on Earth, and how it works by retaining heat. He describes the composition of the atmosphere and the role of greenhouse gases like carbon dioxide and methane. Using a simulation, he demonstrates how these gases interact with light. Historical data from ice cores show past greenhouse gas levels, while modern increases due to industrialization are linked to climate change. The video emphasizes the importance of understanding and managing the greenhouse effect.

What would Earth's temperature be if it were a perfect black body?

• 34 degrees Fahrenheit

• Negative 18 degrees Celsius

• 5.3 degrees Celsius

• 14 degrees Celsius

How does visible light behave when it enters a greenhouse?

• It is trapped inside

• It is absorbed by the plants

• It is reflected back out

• It is converted into infrared radiation

Which gas is not a significant greenhouse gas?

• Carbon dioxide

• Methane

• Water vapor

• Nitrogen

What happens to infrared photons when they interact with greenhouse gases?

• They are completely absorbed

• They are absorbed and re-emitted

• They pass through unaffected

• They are converted into visible light

How do scientists determine past atmospheric compositions?

• By analyzing tree rings

• By studying ice cores

• By measuring current air samples

• By examining rock layers

What is a consequence of increased greenhouse gases since 1750?

• Increased global temperatures

• Decreased global temperatures

• Stable global temperatures

• No change in global temperatures

What effect does melting permafrost have on the atmosphere?

• It releases carbon dioxide

• It releases methane

• It absorbs more sunlight

• It cools the atmosphere