Chapter 29.2 Flashcards

1
Q

an area 15 degrees wide in which the time is the same

A

time zone

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2
Q

the spinning of Earth on its axis

A

rotation

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3
Q

the motion of Earth in an elliptical orbit around the sun

A

revolution

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4
Q

the plane of Earths orbit around the sun

A

ecliptic

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5
Q

occurs when Earth’s rotational axis is tilted directly toward the Sun or away from the sun

A

solstice

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6
Q

Earth’s 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 babylonian symbol for 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 degrees

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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 fir 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

24 time zones

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16
Q

Which direction do you move to add hours to the time

A

East

17
Q

Which direction do you move to subtract hours to your time

A

West

18
Q

How many time zones are there in the United States

A

6 time zones

19
Q

What are the names of the time zones

A

Mountain time zone, Eastern time zone, Pacific time zone, Alaskan time zone, Central time zone, Hawaiian time zone

20
Q

What is a solar day

A

The Earth’s rotation from the sun in the sky from noon one day to noon the next day

21
Q

What is a sidereal day

A

When a certain star rises above the horizon until that same star rises again

22
Q

What are the two main reasons for seasons

A

The axis tilt and how close earth is to the sun

23
Q

Which two seasons have a solstice

A

Summer and Winter

24
Q

Which month is the summer solstice

A

June

25
Q

Which month is the winter solstice

A

December

26
Q

Which two seasons are equinoxes

A

Spring and Fall

27
Q

Which month is the spring equinox

A

March

28
Q

Which month is the Fall equinox

A

September

29
Q

When is the longest day of the year

A

During the Summer solstice

30
Q

When is the shortest day of the year

A

During the winter solstice

31
Q

When are the day almost 12 hours of day and 12 hours of night

A

During the Spring equinox and the Fall equinox