Astronomy college course/Apparent regrograde motion/Quiz01
AstroApparentRetroMotion_Study
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AstroApparentRetroMotion_Study-v1s1
1. ____ motion is in the usual direction, and _______ is motion that has temporarily reversed itself.
- ___ a) indirect; direct
- ___ b) elliptical; retrograde
- ___ c) retrograde; direct
- ___ d) direct; retrograde
- ___ e) direct; elliptical
2. Under what conditions would a planet not seem to rise in the east and set in the west?
- ___ a) if the planet is in retrograde motion
- ___ b) if the observer is near the north or south poles
- ___ c) if the observer is below the equator
- ___ d) if the planet is in elliptical motion
- ___ e) if the planet is in direct motion
3. When the faster moving Earth overtakes a slower planet outside Earth's orbit
- ___ a) tidal forces can be observed on the planet
- ___ b) all of these are true
- ___ c) two of these are true
- ___ d) tidal forces can be observed on Earth
- ___ e) retrograde motion occurs
4. Which planet spends more days in a given retrograde?
- ___ a) They are all equal
- ___ b) Mars
- ___ c) It depends on the season
- ___ d) Earth
- ___ e) Saturn
5. Which planet has more days between two consecutive retrogrades?
- ___ a) Saturn
- ___ b) They are all equal
- ___ c) Mars
- ___ d) Earth
- ___ e) It depends on the season
6. A planet that is very, very far from the Sun would be in retrograde for approximately ___ months.
- ___ a) 24
- ___ b) 6
- ___ c) 1
- ___ d) 12
- ___ e) 3
7. If a planet that is very, very far from the Sun begins a retrograde, how many months must pass before it begins the next retrograde?
- ___ a) 12
- ___ b) 24
- ___ c) 6
- ___ d) 3
- ___ e) 1
9. We know that Galileo saw Neptune, but is not credited with its discovery because
- ___ a) he thought it was a moon of Saturn
- ___ b) it was in a transition between retrograde and direct motion
- ___ c) none of these are true
- ___ d) he never published his drawing
- ___ e) it was too faint to be worth drawing
Key to AstroApparentRetroMotion_Study-v1s1
1. ____ motion is in the usual direction, and _______ is motion that has temporarily reversed itself.
- - a) indirect; direct
- - b) elliptical; retrograde
- - c) retrograde; direct
- + d) direct; retrograde
- - e) direct; elliptical
2. Under what conditions would a planet not seem to rise in the east and set in the west?
- - a) if the planet is in retrograde motion
- + b) if the observer is near the north or south poles
- - c) if the observer is below the equator
- - d) if the planet is in elliptical motion
- - e) if the planet is in direct motion
3. When the faster moving Earth overtakes a slower planet outside Earth's orbit
- - a) tidal forces can be observed on the planet
- - b) all of these are true
- - c) two of these are true
- - d) tidal forces can be observed on Earth
- + e) retrograde motion occurs
4. Which planet spends more days in a given retrograde?
- - a) They are all equal
- - b) Mars
- - c) It depends on the season
- - d) Earth
- + e) Saturn
5. Which planet has more days between two consecutive retrogrades?
- - a) Saturn
- - b) They are all equal
- + c) Mars
- - d) Earth
- - e) It depends on the season
6. A planet that is very, very far from the Sun would be in retrograde for approximately ___ months.
- - a) 24
- + b) 6
- - c) 1
- - d) 12
- - e) 3
7. If a planet that is very, very far from the Sun begins a retrograde, how many months must pass before it begins the next retrograde?
- + a) 12
- - b) 24
- - c) 6
- - d) 3
- - e) 1
9. We know that Galileo saw Neptune, but is not credited with its discovery because
- - a) he thought it was a moon of Saturn
- + b) it was in a transition between retrograde and direct motion
- - c) none of these are true
- - d) he never published his drawing
- - e) it was too faint to be worth drawing
- Attribution (for quiz questions) under CC-by-SA license
- http://en.wikiversity.org/w/index.php?title=Astronomy_college_course/Apparent_regrograde_motion/Quiz01&oldid=1284510
- Study guide
- http://en.wikipedia.org/w/index.php?title=User:Guy_vandegrift/Astronomy_college_course/Apparent_retrograde_motion&oldid=615635101