imlText 2017-2018 File Edit Go Tools Help Section 3: Earth\'s Climate and Climat

Question

imlText 2017-2018 File Edit Go Tools Help Section 3: Earth's Climate and Climate Models Climate Change21/22 Q3.14. Greenhouse gases trap energy because they are transparent to incoming shortwave solar radiation but absorb outgoing longwave radiation emitted from Earth's surface. True False Q3.15. Four billion years ago, our Sun was as m uch as 30% dimmer than it is today. Despite this, Earth has been nearly ice-free for most of its history, suggesting that even when the Sun was dim, Earth's mean temperature was 20 c (273 K) This paradox is often called the "faint young Sun problem." Which of the following! mechanisms could potentially explain this paradox? Check all that apply Ear If Earth had a larger orbit in the past, it would have been warmer f the young Earth's temperatures dropped due to a dim Su ouid form, causing albedo to increase causing temperature to Eatmospheric CO2 concentrations the greenhouse effect cou despite a fainter Sun were much higher in the e produced higher temper

Explanation / Answer

3.14 - TRUE

3.15 - OPTION C - if atmospheric CO2 concentration were much higher

3.16 - POSITIVE FEEDBACK

3.17     a) BECAUSE EARTH SURFACE IS CURVED...

           c) OCEAN HOLDS LOT OF HEAT...

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