Seasons
Seasons happen because Earth's axis is tilted as it orbits the sun, so different parts of the planet receive more or less direct sunlight at different times of year. This is why the Northern and Southern Hemispheres experience opposite seasons at the same time, summer in one while it is winter in the other.
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Midterm
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This final covers a lot of topics, so it's split into 2 parts. Each part includes a question from every one of its topics.
Final, Part 1 of 2
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Final, Part 2 of 2
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