chapter 29.2 Flashcards

1
Q

an area 15 wide in which the time is the same

A

time zone

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2
Q

is the spinning of earths on its axis an imaginary line drawn from earths north pole to its south pole

A

rotation

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3
Q

motion earth in an elliptical orbit around the sun

A

revolution

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4
Q

defined as the plane of earths orbit around the sun

A

ecliptic

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5
Q

occurs when earth rotational axis is tilted directly toward the sun or away from the sun

A

solstice

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6
Q

earths rotational axis is perpendicular to a line drawn from the center of earth to the center of the sun

A

equinox

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7
Q

who devised a method of timekeeping around 3000 B.C

A

babylonians

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8
Q

what was the symbol for degree taken from

A

the sun

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9
Q

how many degrees does the earth spin in one day

A

360 degrees

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10
Q

how many hours does it take the earth to make one full rotation

A

24 hours

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11
Q

how many degrees does the earth spin in one hour

A

15 hours

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12
Q

what direction does the sun rise

A

east

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13
Q

what direction does the sun set

A

west

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14
Q

true or false. all time zones are the exact same size

A

False they are modified to fit around cities,states,and country borders,and other key sites

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15
Q

how many time zones are there in the world

A
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16
Q

what direction do you move to add hours to the time

A

east add hour

17
Q

which direction do you move to subtract hours from the time

18
Q

how many time zones are there in the united states

19
Q

what are the names of the time zones

A
atlantic/atlastic
Pacific time zone 
central 
eastern
hawain time zone
20
Q

what is a solar day

21
Q

what is a sidereal day

22
Q

what are the two main reasons for seasons

A

revolutions

23
Q

which two seasons have a solstice

A

winter and summer

24
Q

which month is the summer solstice

A

December 21st

25
which month is the winter solstice
26
which two seasons are equinox
27
what month is the spring equinox
28
longest day of the year
june 21st
29
shortest day of the year
December 21st