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TEST QUESTION 2.1

TEST QUESTION 2.1. If the mid-night Sun (the Sun is above the horizon at mid night) can be seen at Los Angeles (latitude 34 o N) only on summer solstice, June 21 st , we would deduce the Earth’s spin and orbit are: xA : parallel xB : tilted by 34 o vC : tilted by 56 o

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TEST QUESTION 2.1

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  1. TEST QUESTION 2.1 • If the mid-night Sun (the Sun is above the horizon at mid night) can be seen at Los Angeles (latitude 34o N) only on summer solstice, June 21st , we would deduce the Earth’s spin and orbit are: • xA: parallel • xB: tilted by 34o • vC: tilted by 56o • xD: perpendicular to each other

  2. TEST QUESTION 2.2 • Full moon • vA: rises in the East during Sunset • xB: rises at midnight • xC: can be seen throughout the day • xD: sets in the West around 8pm

  3. TEST QUESTION 2.3 • On July 20, 1969, Neil Armstrong landed on the moon and saw the Earth directly overhead. Two weeks later at the same location on the moon, he would see the Earth • xA: below the horizon • xB: near the eastern horizon • vC: at the same place overhead • xD: near the polaris star

  4. Test question 2.4 • At noon on the first day of the summer (June 21st), the Sun is overhead in Syene but it casts a 7o shadow in Alexandria. If the Earth is like a ball, this observation can be used to measure xA: the size of the Sun xB: the distance of the Sun vC: the size of the Earth xD: the tilt of the Earth’s spin axis

  5. Test question 2.5 • In the year of the horse, the Sun is overhead in Syene at noon on June 21st and it also casts a 7o shadow 800 km north of Syene. On the same day in the following year (the year of the rabbit), the Sun is still overhead in Syene but it casts a 3.5o shadow 800 km north of Syene. This observation indicates that vA: the Earth has doubled its size xB: the Earth has halved its size xC: the Earth remains the same size xD: the Sun halved its distance from the Earth

  6. Test Question 2.6 • Heliocentric theory was originally proposed xA: by Copernicus during the renaissance xB: by Ptolemy in 2 century BC to describe the retrograde motion of the planets vC: by Aristarchus in 4 century BC, but it was disfavored by the lack of parallax. xD: by Hipparcus in 2 century BC to account for the seasons

  7. Test question 2.7 • Sidereal period of planets refers to the time it takes for them to complete one orbit around the Sun as seen from a fixed location xA: on the Sun, xB: on the Earth vC: in space outside the solar system xD: on that planet

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