تآكل طبقة الأوزون وارتفاع درجة حرارة الأرض: ظاهرة الاحتباس الحرارى

The video explains the greenhouse effect, likening it to a glasshouse. Sunlight passes through Earth's atmosphere, where visible and shortwave radiation is absorbed by the Earth and re-emitted as infrared radiation. Increased greenhouse gases in the troposphere trap this infrared radiation, leading to global warming. The video defines global warming as the trapping of infrared radiation due to elevated greenhouse gas levels, causing Earth's temperature to rise.

What role do greenhouse gases play in the Earth's atmosphere?

• They allow all types of radiation to escape.

• They cool down the Earth's surface.

• They trap heat, similar to glass in a greenhouse.

• They block sunlight from reaching the Earth.

How does the Earth's surface interact with sunlight?

• It reflects all sunlight back into space.

• It absorbs sunlight and re-emits it as infrared radiation.

• It absorbs sunlight and stores it as visible light.

• It blocks sunlight from reaching the atmosphere.

What happens to infrared radiation when greenhouse gases are present in high concentrations?

• It is trapped in the troposphere, causing warming.

• It easily escapes into space.

• It is absorbed and re-emitted as visible light.

• It is converted into ultraviolet radiation.

What is the primary cause of the greenhouse effect?

• Reduction in solar radiation.

• Increase in greenhouse gases in the troposphere.

• Decrease in atmospheric gases.

• Increase in Earth's albedo.

What is the result of the greenhouse effect on Earth's temperature?

• It stabilizes the temperature.

• It causes a decrease in temperature.

• It has no effect on temperature.

• It causes an increase in temperature.