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24 March, 19:29

7. Which one of the following is the main reason why the Earth has seasons? (a) Earth's orbit is elliptical. We have summer when we are closer to the Sun and winter when we are farther from the Sun. (b) The tilt of Earth's axis of rotation causes one hemisphere of the planet to be substantially closer to the Sun during the day than the other hemisphere. Because it is closer to the Sun, it receives more solar energy per hour. (c) Over the course of the year, the tilt of Earth's axis varies from 23.5° to 0° in such a way as to bring more heating per hour in the summer than in the winter. (d) The tilt of Earth's axis of rotation causes the Sun to pass higher in the sky during the day in one hemisphere than in the other, thereby giving more daylight hours and more heating per hour. (e) It has seasons so that sunbathers will know when to go to the beach, and skiers will know when to go skiing.

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  1. 24 March, 19:41
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    Answer: (C) Over the course of the year, the tilt of Earth's axis varies from 23.5° to 0° in such a way as to bring more heating per hour in the summer than in the winter

    Explanation: The Earth's axis is tilted 23.5 degrees, which causes one of the hemispheres to be closer to the sun, but not only during the day, but at a certain time of the year called summer. When one of the hemispheres is closer to the sun during the day, it is also closer to the sun during the night because one part of that hemisphere is in the dark, but only until morning until the earth turns around its axis.

    This means that during the summer, more sunshine hours at certain hemisphere, more heating per hour, so sunbathers can enjoy it, and skiers in the same hemisphere wait until that hemisphere is farther away from the sun, which means less hours of sunshine, cooler weather, maybe even snow, so they can to ski and then enjoy.
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