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Choose the correct word(s) that make the statement true. Say you live in the southern hemisphere and the date is March 20. For you, summer is ending. Therefore, the March 20th date is the first day of (spring, summer, fall, winter), an event called the (vernal equinox, summer solstice, autumnal equinox, winter solstice ) .

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fall, vern...

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Precession of Earth's axis causes the date at which perihelion of Earth's orbit occurs to slowly change.

A) True
B) False

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What would you see if you were on the Moon and facing Earth when people on Earth saw a total lunar eclipse?

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You would see the Sun eclipsed...

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The ________ cycle of the phases of the Moon is due to the Moon's spherical shape and the ______ shining on it from different directions.


A) monthly; Earth
B) yearly; Earth
C) monthly; S un
D) yearly; Sun

E) All of the above
F) B) and C)

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Earth's orbit is nearly circular, varying by only a few percent in distance from the Sun over one orbital period.

A) True
B) False

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In which direction does the daily motion of the Moon occur in the sky, against the background stars, when viewed from the Earth?


A) toward the west
B) toward the east
C) toward the north celestial pole in the summer and the south celestial pole in the winter
D) No predictable pattern can be discerned.

E) B) and D)
F) A) and B)

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Relative to the stars, the Moon moves about ____ eastward in the sky each night.


A) 1°
B) 5°
C) 13°
D) 27.3°
E) 29.5°

F) C) and E)
G) A) and E)

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The ____ of the Moon is the period of time for the Moon to complete a cycle of the lunar phases and is approximately 29.5 days long.


A) sidereal period
B) Saros cycle
C) synodic period
D) eclipse season
E) umbral period

F) A) and B)
G) C) and D)

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The sidereal period of the Moon is


A) about 27.32 days long.
B) the period of time for the Moon to orbit Earth once with respect to the stars.
C) the period of time between successive eclipses at a given location on Earth.
D) the period of time from when the Moon rises until the Moon rises again the next night.
E) about 27.32 days long and the period of time for the Moon to orbit Earth once with respect to the stars.

F) None of the above
G) A) and E)

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The Moon always keeps the same side facing Earth.

A) True
B) False

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If you were on the Moon during a total lunar eclipse, the Sun would be hidden behind Earth.

A) True
B) False

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The time for the Moon to repeat its cycle of phases is equal to


A) its sidereal period.
B) one day.
C) one hour.
D) one year.
E) its synodic period.

F) All of the above
G) C) and D)

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A third-quarter Moon is visible


A) near the eastern horizon just before sunrise.
B) near the eastern horizon just after sunset.
C) in the southern sky at sunrise.
D) in the southern sky at sunset.
E) from sunset until sunrise.

F) A) and E)
G) A) and D)

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Astronomy is pseudoscience.

A) True
B) False

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The inclination of the axis of the Earth varies from 22 ° to 24 ° degrees taking ____ to complete a cycle. This is a factor in the Milankovitch hypothesis of ice ages.


A) 24 hours
B) 1 year
C) 499 years
D) 41,000 years
E) Wrong! The Earth's axis tilt is fixed at exactly 23.50 with no variation whatsoever.

F) B) and D)
G) None of the above

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The ecliptic passes through the zodiac.

A) True
B) False

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Why have more people seen total lunar eclipses than total solar eclipses?

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Earth casts a larger shadow on the Moon ...

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The vernal equinox occurs above the same geographic point on Earth from year to year.

A) True
B) False

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The Moon's angular diameter in our sky as observed from Earth is measured to be 0.5°. From this, we can find the diameter of the Moon in kilometers if we also know the Moon's


A) distance from the Earth.
B) element composition
C) distance from the Sun.

D) B) and C)
E) A) and B)

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__________ refers to turning motion around a body's axis whereas ___________ refers to motion of a body around a point.

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Rotation, ...

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