Midterm1Key-ExamC

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School

The University of Oklahoma *

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Course

1504

Subject

Astronomy

Date

Oct 30, 2023

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pdf

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Uploaded by CaptainChinchilla3775

ASTR 1504/1514 Exam 1 September 18, 2023 Exam Version C Choose the answer that best completes the question. Read each problem carefully and read through all the answers. Take your time. If a question is unclear, come see me. Mark answers on your test and scantron. You keep your test and turn in your scantron to me when finished. 1. The Exam Version listed at the top is: (1 point) (a) Version A (b) Version B (c) Version C Multiple Choice Section - 3 points each 2. How long does it take the Earth to orbit the Sun once? (a) 1 hour (b) 24 hours (c) 1 month (d) 1 year (e) 10 years 3. There is a lunar eclipse when (a) The Moon passes through the Sun’s shadow (b) The Earth passes through the Sun’s shadow (c) The Moon passes through the Earth’s shadow (d) The Moon’s distance to the Earth is at a minimum (e) The Moon is in between the Sun and the Earth

4. The Sun sets in the sky every 24 hours because (a) The Earth takes 24 hours to orbit once around the Sun (b) The Sun takes 24 hours to orbit once around the Earth (c) The Moon and stars get jealous and need some attention too (d) The Earth spins around on its axis once every 24 hours (e) The Earth takes one year to orbit the Sun 5. Below is a diagram of the Earth and Sun as viewed from above. The Moon’s orbit is marked with the dashed line. If you saw a full moon on Earth, where would the moon be in its orbit? (Choose from points A-E) 6. How long does it take the Moon to orbit the Earth once? (a) 1 hour (b) 24 hours (c) 1 month (d) 1 year (e) The Moon orbits around the Sun, not the Earth

7. In the planetary orbit shown below, approximately where would the Sun be positioned? (Choose from points A-C) 8. Of the following types of radiation, which has the most energetic photons? (a) Infrared (b) X-rays (c) Visible light (d) Radio waves (e) Ultraviolet 9. In the planetary orbit shown below, where would the planet be moving fastest? (Choose from points A-E) 10. In the planetary orbit shown above, where is the planet at aphelion? (Choose from points A-E)

11. Of the following types of radiation, which has the longest wavelength? (a) Infrared (b) X-rays (c) Visible light (d) Radio waves (e) Ultraviolet 12. If a planet always has the same distance to the Sun throughout its whole orbit, its orbital eccentricity is (a) 0 (b) 1 (c) 10 (d) -1 (e) 0.5 13. The North Star (Polaris) does not appear to move throughout the night because (a) it is the brightest star in the sky (b) It is positioned directly over the Earth’s north pole (c) it isn’t moving through space (d) It is aligned with the Moon’s orbit (e) it is the closest star to earth 14. How long is the day as compared to the night on Spring Equinox and Autumnal Equinox? a) Day is longer, night shorter b) Day is shorter, night longer c) Day and night are equal

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