Penn State Astro 001 Exam 1 Exam Review.pdf file:///C:/Users/HP/Desktop/dddd/Penn%20State%20Astro%20001%
Penn State Astro 001 Exam 1 Exam Review
Questions & Answers
1. What causes day and night?
Answer Rotation of Earth on its Axis
2. How does the Sun appear to move in the sky in the course of a day?
Answer Eastto West bc of Earth's rotation. The stars and planets move the same way, also bc
Earth's rotation
3. What happens to the Earth in one year?
Answer It orbits the Sun one time
4. Why do we have seasons?
Answer Tilt of Earth's axis (not changing from Sun). The tiltis about 23 degrees
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,Penn State Astro 001 Exam 1 Exam Review.pdf file:///C:/Users/HP/Desktop/dddd/Penn%20State%20Astro%20001%
5. How is the Earth's axis tilted when we have summer in the Northern hemi-sphere?
Answer With the N. Pole toward Sun
6. What season is it in the Southern hemisphere when it is summer in theNorthern
hemisphere?
Answer Winter
7. When does Winter begin, and what does it entail?
Answer Begins Dec. 21. Nightslonger than Days.
8. When does Spring begin, and what does it entail?
Answer Begins March 21. Daysand Nights are equal.
9. When does Summer begin, and what does it entail?
Answer Begins June 21. Dayslonger than Nights.
10. When does Fall begin, and what does it entail?
Answer Begins Sept. 21. Days andNights are equal.
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,Penn State Astro 001 Exam 1 Exam Review.pdf file:///C:/Users/HP/Desktop/dddd/Penn%20State%20Astro%20001%
11. Why do seasons happen?
Answer Seasons would NOT happen if the Earth's axis were not tilted. Distance between
Earth and Sun does not change much over thecourse of the year so temp. does not change
much for that reason.
12. What happens to the Moon in 1 month?
Answer It moves around the Earth one time
13. What causes the phases of the Moon?
Answer Sun is lighting different fractions of thepart of the Moon we can see on Earth
14. What is the order of the phases of the Moon?
Answer 1. New
2. Waxing Crescent
3. First Quarter
4. Waxing Gibbous
5. Full
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