ch 29.3 Flashcards

1
Q

a rise or fall in the ocean surface

A

tide

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2
Q

reflects the change in appearance of the moon

A

moon phase

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3
Q

the moon directly moves between the sun and the earth

A

solar eclipse

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4
Q

the earth passes between the sun and the moon

A

lunar eclipse

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5
Q

the dark colored, flat, lava filled regions on the moons surface

A

Maria

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6
Q

a layer of dusty lunar material created by collisions between astroids

A

regolith

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7
Q

How many days does it take the moon to revolve around the Earth?

A

27.3 days

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8
Q

A complete lunar phase cycle takes 29.5 days, what is this called?

A

29.5 days (synodic month)

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9
Q

do we ever see the back side of the moon?

A

no

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10
Q

what causes the tide to rise or fall?

A

gravitational pull by the sun and the moon

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11
Q

what is the rise of sea level called?

A

high tide

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12
Q

after the sea level rises how many hours does it take for the sea level to drop?

A

about 6 hours

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13
Q

which is father away from the earth the sun or the moon?

A

the sun

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14
Q

does the moon or the sun cause a greater effect on earth’s tide?

A

moon

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15
Q

how are the sun, the moon, and the earth aligned for a spring tide?

A

straight line

sun earth moon

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16
Q

how are the sun, the moon, and the earth aligned for a neap tide?

A

90 degree angle

sun earth moon

17
Q

what does the phase of the moon you see depend on?

A

the positions of the moon the sun and the earth relative to each other

18
Q

when does a new moon occur?

A

when the moon is between the sun and earth

19
Q

how many phases of the moon are there?

A

eight phases

20
Q

what is the definition of waxing phases?

A

the illuminated portion of the moon that we see appears lager each night

21
Q

what is the definition of waning phases?

A

the illuminated portion of the moon that we see becomes smaller each night

22
Q

what are the moon phase names?

A

new moon, waxing crescent, 1st quarter, waxing gibbous, full, waning gibbous, 3rd quarter, waning crescent

23
Q

where is the word month derived from?

24
Q

how is the sun, the moon, and the earth aligned for a solar eclipse?

A

sun moon earth

25
what is an umbra?
the darkest portion of the moons shadow
26
what is a penumbra?
the lightest portion of the moons shadow
27
how is the sun, the moon, and the earthed aligned for a lunar eclipse?
sun earth moon
28
how are the depressions on the moon formed?
asteroids, comets, and meteorites
29
are there mountains on the moon?
yes
30
which side of the moon is thicker?
the side facing away from earth
31
is the mantel of the moon a solid or a liquid?
solid
32
what did the clementine spacecraft do? (two things)
confirmed the thickness of the moon and | provided information on the mineral content
33
what did the lunar prospect do? (three things)
took photographs of the surface confirmed the moon has a small iron rich core confirmed the presence of water on the moon
34
what is the giant impact theory?
it was thought to be that a mars sized object collided with earth and sent debris out in to orbit the debris condensed forming a large mass called the moon