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Physical Science > 29.3 > Flashcards

29.3 Flashcards

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1
Q

how many days does it take the moon to revolve around earth?

A

27.3 days

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2
Q

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

A

synodic month

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3
Q

do we ever see the back side of the moon?

A

no

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4
Q

what causes a tide to rise or fall?

A

gravitational pull by sun and moon

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5
Q

what is the rise of the sea level called?

A

high tide

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6
Q

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

A

about 6 hours

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7
Q

which is farther from earth, the sun or the moon?

A

the sun

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8
Q

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

A

the moon

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9
Q

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

A

straight line

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10
Q

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

A

90 degree angle

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11
Q

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

A
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12
Q

when does a new moon occur?

A

moon is between sun and earth

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13
Q

how many phases of the moon are there?

A

8

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14
Q

what is the definition of waxing phases?

A

the illumated portion that we see appears larger each night

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15
Q

what is the definition of waning phases?

A

illuminated portion of moon become less each night

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16
Q

what are the moon phases names?

A 
new moon
waxing crescent
first quarter
waxing gibbous
full
warning gibbous
3rd quarter
waning crescent
17
Q

where is the word month derived from?

A

moon

18
Q

how is the earth moon and sun aligned during the solar eclipse?

A

moon moves directly between the sun and earth

19
Q

how is an umbra?

A

darkest portion of the moon’s shadow

20
Q

what is a penumbra?

A
21
Q

how is the earth moon and sun aligned during the lunar eclipse?

A
22
Q

how are the depressions on the moon formed?

A
23
Q

are there mountains on the moon?

A
24
Q

which side of the moon is thicker?

A
25
Q

what did the clemetine do?

A

comfirmed crust on sidesfacing earht, provided info on mineral content

26
Q

what did lunar prospector do?

A

took photographs of surface, confirmed moon had small iron-rich core, prensence of ice-water on moon

27
Q

what is the giant impact theory?

A

mars size object collide with earth sending debris out into orbit, debris condensed creating large mass, whoch is moon

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