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dis4-slides - ASTR 100 Discussion 4 Oct 3 2011 1 Each of...

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ASTR 100 Discussion 4 Oct. 3, 2011
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1. Each of the images shown below represents a College Park observer's view of the eastern horizon on a particular date. The location of the rising Sun is shown directly under the arrow, and the arrow indicates the locations on the horizon where the Sun will be rising in the next few days. Place the images in chronological order starting with today's date (Feb. 23).
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Answer: First day: C Second day: B Third day: A Fourth day: D
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2. This summer you are telling a friend about what you learned in ASTR 100, and he doesn't believe you when you say that the distance the Earth is from the Sun does NOT cause the seasons. Describe ONE observation that you could make about the Sun, the Earth, and/or the seasons that would provide evidence to back you up. Be sure to explain in each case how the observation is evidence supporting your position.
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Answer: This is an excellent answer by a student: “I would fly him from Maryland to South America to see it is winter. I would point out the fact that the North and South hemispheres have opposing seasons. If proximity to the Sun caused the seasons would the northern and southern hemispheres not have the same seasons[?] Instead it is caused by the tilt of the Earth and how much [sunlight] is exposed to each hemisphere.” (continued)
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