AST Unit I Exam Questions With all Correct Answers
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AST Unit I
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AST Unit I
AST Unit I Exam Questions With all Correct Answers
As shown in the figure, a solar day requires about an extra 1° of rotation, or a total of about 361° of rotation for Earth. Therefore, a solar day is longer than a sidereal day by about __________.
1. 24 hours
2. 1/360 of 24 hours
3. 1/36...
AST Unit I Exam Questions With all Correct
Answers
As shown in the figure, a solar day requires about an extra 1° of rotation, or a total of about 361° of
rotation for Earth. Therefore, a solar day is longer than a sidereal day by about __________.
1. 24 hours
2. 1/360 of 24 hours
3. 1/360 of a minute
4. 1 minute - ANSWER-1/360 of 24 hours
.Based on your answer to Part E, the time from one new moon to the next must be _________.
1. longer than the Moon's actual orbital period by about 1/12 of the 27-day orbital period
2. longer than the Moon's actual orbital period by about 1/12 of a year
3. shorter than the Moon's actual orbital period by about 1/12 of the 27-day orbital period
4. shorter than the Moon's actual orbital period by about 1/12 of a year - ANSWER-longer than the
Moon's actual orbital period by about 1/12 of the 27-day orbital period
.Beijing and Philadelphia have about the same latitude but very different longitudes. Therefore, tonight's
night sky in these two places:
1. Will look about the same
2. Will have completely different sets of constellations
3. Will have partially different sets of constellations - ANSWER-Will look about the same
.By locating the north celestial pole (NCP) in the sky, how can you determine your latitude?
1. The altitude of the NCP is the same as your latitude.
, 2. The direction of the NCP is the same as your latitude.
3. The altitude of the NCP is the same as your distance from the North Pole.
4. The altitude of the NCP is your angular distance from the North Pole.
5. The direction of the NCP is the angular distance from the North Pole. - ANSWER-The altitude of the
NCP is the same as your latitude.
.During the period each year when we see Mars undergoing apparent retrograde motion in our sky,
what is really going on in space?
1. Earth is catching up with and passing by Mars in their respective orbits.
2. Earth and Mars are on opposite sides of the Sun.
3. Mars is moving around the Sun in the opposite direction from which Earth is moving around the Sun.
4. Earth and Mars are getting closer together. - ANSWER-Earth is catching up with and passing by Mars
in their respective orbits.
.During the time that a planet is in its period of apparent retrograde motion, _________.
1. the planet moves backwards (clockwise as viewed from above Earth's north pole) in its orbit of the
Sun
2. the planet appears to rise in the west and set in the east, rather than the usual rising in the east and
setting in the west
3. over many days or weeks, the planet moves westward relative to the stars, rather than the usual
eastward relative to the stars
4. the planet is getting closer to the Sun in its orbit - ANSWER-over many days or weeks, the planet
moves westward relative to the stars, rather than the usual eastward relative to the stars
.How long does it take Earth to rotate exactly 360 degrees?
1. Slightly less than 24 hours
2. 24 hours
3. Slightly more than 24 hours
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