Astronomy & Earth Motions Test 2 Flashcards

1
Q

Star trails

A

streaks of star light on a time exposure photograph as earth rotates

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2
Q

Right side of the moon is illuminated

A

when full moon is approaching

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3
Q

left side of the moon is illuminated

A

after full moon

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4
Q

waxing

A

new

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5
Q

waning

A

old

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6
Q

Blue moon

A

2nd full moon of the month

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7
Q

The big bang theory

A

13.7 billion years ago all matter in the universe exploded

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8
Q

The Doppler effect

A

sound going from low to high to low

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9
Q

low pitch

A

long

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10
Q

high pitch

A

short

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11
Q

sound approaching

A

shorter –> higher pitch

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12
Q

sound moving away

A

longer –> lower pitch

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13
Q

earthshine

A

seeing the “dark side” of the moon * only new crescent or old crescent

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14
Q

Tides

A

highest range : new moon, full moon

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15
Q

What causes tides?

A

gravity of moon and sun

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16
Q

Light year

A

distance light travels in one year

17
Q

Light travels at

A

186,282 miles/second

18
Q

the moon is about ____ light seconds away

A

1.2

19
Q

the sun is about ___ light minutes away

A

8.5

20
Q

1 light year takes

A

4,000 years

21
Q

our solar system is at a

A

spiral arm