What Is The Natural Greenhouse Effect?

What is the primary role of Earth's atmosphere in the natural greenhouse effect?

• To increase the Earth's gravitational pull

• To trap heat and keep the planet warm

• To reflect sunlight back into space

• To absorb all types of solar radiation

Which type of solar energy is mostly absorbed by the Earth?

• Radio waves

• Ultraviolet rays

• Visible light

• Gamma rays

How does the greenhouse effect compare to a car left in the sun?

• Both trap heat inside by blocking infrared radiation

• Both cool down quickly after sunset

• Both reflect visible light back into the atmosphere

• Both allow infrared radiation to escape easily

What happens to the heat emitted by the Earth as infrared radiation?

• It is completely absorbed by the atmosphere

• It is converted into visible light

• It escapes easily back into space

• It is partially absorbed by greenhouse gases

Which gases are primarily responsible for the natural greenhouse effect?

• Methane and ozone

• Helium and neon

• Water vapor and carbon dioxide

• Oxygen and nitrogen

What was the approximate concentration of carbon dioxide in the atmosphere before industrialization?

• 2.8%

• 0.028%

• 0.21%

• 28%

Why is the natural greenhouse effect important for life on Earth?

• It prevents all solar radiation from reaching the surface

• It keeps the Earth's temperature too high for life

• It eliminates the need for an atmosphere

• It maintains a temperature suitable for life