QUESTION 11 Sunsets and sunrises often appear red because O the Sun emits more r

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QUESTION 11 Sunsets and sunrises often appear red because O the Sun emits more red ight when it's rising and setting. O sunlight must pass through more atmosphere, which scatters the shorter wavelengths more than the longer wavelengths, allowing more red light to reach your eye the cooler atmosphere in the morning and evening absorbs more blue light. O sunlight must pass through more atmosphere, which scatters the longer wavelengths more than the shorter wavelengths, allowing more red light to reach your eye none of the above QUESTION 12 400 350 300 250 200 150 today 1750 800 700 600 500 400 300 200 100 0 thousands of years ago since 1750. Refer to the figure above. The CO2 concentration of the atmosphere has increased by about O 1000 parts-per-million 10 parts-per-million O None. It has decreased. QUESTION 13 The greenhouse effect makes Earth warmer than it would be otherwise by about O 30 K O -16 K. O 15 K O There is no greenhouse effect

Explanation / Answer

Q 11 b) Sunlight must pass through more atmosphere, which scatters the shorted wavelengths more than the longer wavelength, allowing more red light t o reach your eye

Q12 c)

Q13 30K

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