__ is the time for earth to rotate once; ___ is the time for the moon to orbit the earth once; ___ is the time for earth to orbit the sun once - ️️day, month, year
___ appear to move among the "fixed" stars over longer times. In ancient greece, they called these ___, or ___. They lie close to ...
ASTR 121|79 Midterm Exam Quiz Review
Questions
__ is the time for earth to rotate once; ___ is the time for the moon to orbit the earth once; ___ is the
time for earth to orbit the sun once - ✔ ✔ day, month, year
___ appear to move among the "fixed" stars over longer times. In ancient greece, they called these ___,
or ___. They lie close to the ___. - ✔ ✔ moon and planets, wandering stars, planets, ecliptic
A crescent moon is visible in the northern hemisphere, with
the crescent shape on the right side of the Moon. This phase
is called:
A. Waxing crescent
B. Waning crescent
C. Waxing gibbous
D. Waning gibbous - ✔ ✔ A
All of the solar system planets would fit within the distance
between the Earth and the Moon.
Which planets are actually between the Earth and the Moon?
Venus and Mars
B. Venus and Jupiter
C. Mercury and Jupiter
D. Saturn, Jupiter, and Venus
E. No planets are between - ✔ ✔ E
Astrology is a ___, that deals with the supposed influences on human destiny of the locations in the sky
of the sun, planets, etc. Astronomy is a ___ and is synonymous with ___. There is/is not scientific
evidence for astrology. - ✔ ✔ pseudoscience; science; astrophysics; not
At ___, stars circle the zenith and don't rise or set. - ✔ ✔ poles
At ___, stars rise and set straight up and down. - ✔ ✔ equator
, At ___, the celestial equator is the same as the horizon. - ✔ ✔ poles
distance from the earth to the moon? - ✔ ✔ 390,000 km
During a ___ eclipse, the sun is eclipsed by the earth, casting a shadow on ___. If earth totally blocks the
sun, it's called a ___. - ✔ ✔ lunar, moon, total (vs partial) lunar eclipse
During a ___ eclipse, the sun is eclipsed by the moon, casting a shadow on ___. if the moon totally
blocks the sun, it is called a ___. - ✔ ✔ solar, earth, total (vs. partial) solar eclipse
During an eclipse, what happens? What is special that allows the sun and moon appear to be the same
size? - ✔ ✔ -earth or moon casts a shadow on the other
-sun is about 400x bigger than moon, and moon is about 400x closer than the sun to earth
During what moon phase does a lunar eclipse occur?
A. New moon
B. Waxing gibbous
C. Full moon
D. Waning crescent
E. Can occur in any phase - ✔ ✔ C
Earth's axis of rotation is tilted at about
___. The ecliptic is/is not aligned with the celestial equator? - ✔ ✔ 23.5 degrees, not
explain foucault's pendulum; at a pole, the plane of pendulum rotates how often? - ✔ ✔ -when you
swing a large pendulum, it will swing in a fixed plane, and earth is spinning relative to that plane
-every 24 hours
Explain the phases of the moon, and also which time each is fullest, and which way the earth rotates. -
✔ ✔ eastward (in n. hemisphere, counterclockwise)
high and low tides vs spring and neap tides? - ✔ ✔ -high and low are the ones every day, that occur
as we rotate our position on earth, the water staying pull toward the earth-moon line at high tides
-the spring and neap tides occur because of the moon's position relative to the earth and sun in its cycle
how do we know the solar system circles the sun? - ✔ ✔ -retrograde motion and venus going
through stages, like our moon
How much of the moon and earth are illuminated at a time? - ✔ ✔ half and half, baby
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