10493381767903e7 10001 Weather and Climate 2018 Course Home C02 - Heating the Ea

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10493381767903e7 10001 Weather and Climate 2018 Course Home C02 - Heating the Earth's Surface and Atmosphere Question 11 Part A The primary cause of Earth's seasons is: varying orbital speed O changes in atmospheric thickness. O tilt of Earth's rotation axis, which causes sun angles and daylight length to vary O regular changes in radiation emitted by the Sun. O varying distance from the Sun, which changes how much radiation Earth receives from the Sun. Request Answer yct/itemView?assignmentProblem/D-7310702offset-prev

Explanation / Answer

11. The primary reason for the seasons is the tilt of the the Earth axis about an angle of 23.5 degree towards the Sun or away from it as it revolves. The tilting allows the differential heating and thereby the change of seasons, too. The answer is option c.

Part A. The atmosphere is primarily heated by the radiation of the waves from the surface of the Earth in the form of infrared waves. The Earth tries to radiate back the Sun's waves that reach the Earth and in doing so, the atmosphere gets heated up. So the answer is option c.

Part A. The Earth emits radiation all the time, whether it be day or night, or continents or the oceans. There is no specific timings or seasons for the radiation to take place. Its a continuous process in which the waves that strike the surface of the Earth radiates back to the atmosphere.

Part A. The objects with higher temperature will emit more of its radiation as the short wavelengths because of the temperature being inversely proportional to the wavelength in case of blackbody radiation. For the cooler objects, it radiates more of its energy in the form of long waves. The answer is option a.

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