Atmosphere, Weather & Climate

What happens to most solar radiation when it reaches the surface of the earth?

• It reflects back

• It's collected in solar panels

• It's absorbed by land, water, and plants

• It disperses throughout the earth's atmosphere

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About 78% of the Earth's atmosphere is comprised of _____.

• oxygen

• carbon dioxide

• argon

• nitrogen

Which of these in NOT one of the reasons the atmosphere is important?

• it is where weather occurs

• it is where you can find the aurora borealis, beautiful lights in the night sky

• it contains gases needed for photosynthesis

• without it, sound could not travel to our ears

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Which two layers of the atmosphere contain air as warm as 25℃?

• Troposphere and Thermosphere

• Troposphere and Mesosphere

• Thermosphere and Mesosphere

• Stratosphere and Thermosphere

According to this image, the coldest temperatures in the atmosphere occur at an altitude of about ___.

• 10 km

• 35 km

• 65 km

• 80 km

What would happen if there were no atmosphere?

• temperatures would be super cold all the time and the ice ages would return

• temperatures would be super cold at night and super hot during the day

• temperatures would be super hot all the time

• ultraviolet radiation from the Sun would fry all life on Earth

The fact that global warming has only been a problem for the last 100 years or so tells us that...

• prior to 100 years ago, the greenhouse effect on the earth was too minor to be detected

• the earth moved significantly closer to the sun about 100 years ago

• people have only been pumping large quantities of greenhouse gases into the atmosphere for 100 years or so

• the movement of glaciers was a major problem for people 100 years ago.

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How can cutting down trees increase global warming?

• trees use carbon dioxide from the air to conduct photosynthesis

• trees provide shade, which counteracts global warming

• trees absorb the sun's energy without radiating it back into the atmosphere

• none of the above

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Greenhouse gasses can be made by ___.

• burning fossil fuels in our cars

• burning forests

• with large-scale agriculture

• all of these

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Earth's greenhouse effect and an actual greenhouse are similar. Which of the following points out a difference between the two?

• heat escapes from a greenhouse more easily than it does from Earth's atmosphere

• actual greenhouses are cold in winter, while the greenhouse effect has led to warm winters across the earth

• the glass in a greenhouse traps heat, while greenhouse gases in the atmosphere absorb and recycle heat

• there is no significant difference; both work pretty much the same way