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phisical science > ch 29.1-29.4 > Flashcards

ch 29.1-29.4 Flashcards

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Biology 101 flashcards
1
Q

round, three-dimensional object, the surface of witch is the same distance from the center in all directions

A

sphere

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2
Q
A

ellipse

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3
Q

is earth a perfect sphere

A

The diamiter is wider then pole to pole, No

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4
Q

what are some ancient observations that shows earth is a sphere

A

and object falls straight down, the earths shadow on the moon is cerved, people on the other side of earth see diferent starts

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5
Q

what are two factors that affect gravitational strganth

A

masses and distance

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6
Q

what dores the magnetic field portect earth from

A

harmful radiation from sun

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7
Q

whitch hemishpere is the north megnetic pole located in

A

northern pole

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8
Q

whatch dergrees does earths axes tillt

A

11.7degrees

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9
Q

can this evenct magnetic poles change

A

yes

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10
Q

what is the name of the large scale movement where the magnetic poles swich

A

magnetic reversal

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11
Q

when does the magnetic poles swich

A

every 200,000 years

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12
Q

whitch part of the earhs magnetic field deflects harmful radiation from the sun

A

magnetosphere

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13
Q

what are they two names for the northern and southern lights

A

Aurors Borealis (northern lights) Aurora Australis ( southern lights)

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14
Q

how are the Auroras created?

A

electrically-charged particles collide with atomsphere and emit light

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15
Q

when is earth closest and farthest from the sun

A

eary january- 147 million km

July- 152 millon km

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16
Q

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

A

time zone

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17
Q

the spining of Earth on it’s axis(an imaginaty line drawn from Earth’s north pole to south pole

A

rotation

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18
Q

motion pf Earth in an elliptical ordit around the sun

A

revolution

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19
Q

plane of earths obit around the sun

A

ecliptic

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20
Q

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

A

solstice

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21
Q

earth’s rotational axis is perpendicular to a line drawn from the center of the Earth’ to the center of the sun

A

equinox

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22
Q

who devised a method of timekeeping around 3000 B.C.?

A

Babylonians

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23
Q

what was the symbol foe degree taken from?

A

taken from their symbol for the sun

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24
Q

How many degrees does the earth spin in on day?

A

360 degrees

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25
Q

How many hours does it take the eath to make one full rotstion?

A

24 hours (23 hours 56 minutes)

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26
Q

How many degrees does the earth spin in one hour?

A

15 degrees

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27
Q

What direction does the sun rise?

A

east

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28
Q

What direction does the sun set?

A

west

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29
Q

True or False: All time zones are the exact same size?

A

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

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30
Q

How many time zones are there in the world?

A

24 time zones

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31
Q

Which direction do you move to add hours to the time?

A

east

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32
Q

which direction do you move to subtract hours from the time?

A

west

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33
Q

How many time zones are there in the United States?

A

6 time zones

34
Q

What are the nameds of the time zones in the United States?

A

Alantic, Pacific, mountain, estern, sentral, hawallan,

35
Q

What is a solar day?

A

noon one day to noon the other day

36
Q

What is a sideral day?

A

looking at one star one night and then that same star the next night

37
Q

What are the two main reasons for seasons?

A

revelution and the tillt of the axis

38
Q

Which two seasons have a solstice?

A

summer winter

39
Q

Which month is the summer solstice?

A

june

40
Q

Which month is the winter solstice?

A

december 21

41
Q

Which two seasons are equinoxes?

A

spring fall

42
Q

Which is the spring rquinox?

A

march 20th 21st

43
Q

Which month is the fall equinox?

A

september 22nd 23rd

44
Q

When is the longest day of the year?

A

summer solstice

45
Q

Which is the shortest day of the year?

A

december solstice

46
Q

When are the days almost 12 hours of day and 12 hours of a night?

A

equinoxes

47
Q

rise or fall in the oceans surface

A

tide

48
Q

reflects the change in appearance of the moon as seen from Earth

A

moon phase

49
Q

occurs when Earth moves directly between the sun and the moon casts a shadow on the moon

A

solar eclipse

50
Q

occurs when Earth passes between the sun, the moon and casts a shadow on the moon

A

lunar eclipse

51
Q

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

A

maria

52
Q

later of dusty lunar material produced by collision between asteroids and comets and the moon

A

regolith

53
Q

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

A

27.3 days

54
Q

A commplete lunat phase cycle takes 29.5 days, what is this called?synodc month

A
55
Q

Do we ever see the back side of the moon?

A

no

56
Q

what causes a tide to rise or fall?

A

gravitational pull by the sun and the moon

57
Q

what is the rise of sea leavel called?

A

high tide

58
Q

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

A

6 hours later

59
Q

Which is farther from Earth, the sun or the moon?

A

sun

60
Q

Does the moon or the sun cause s greater effect on Earth’s tides?

A

moon

61
Q

How are the sun, the earth, the moon aligned foe a spring tide

A

they are in a stragit line Sun, Earth, Moon

62
Q

How are the earth, the sun and the moon aligned for the neap tide

A

they are in a 90 drgree angle

63
Q

what does the phase of the moon you see depend on

A

positions of the moon, earth, and sun

64
Q

when does a new moon occur

A

when the moon is between the earth or the sun

65
Q

how many pases of the moon are there?

A

8

66
Q

what is the definition of waxing phases?

A

the portion that we see apperars larger waxh night

67
Q

what is the defintion of a warning phases?

A

the ilumination of the moon gets less and less each night

68
Q

what are the moon phases names?

A

New moon, waxing crescent, 1st quarter, waxing gibbous, full, warning gibbous, 3rd quarter warning crescent

69
Q

where is the word month derived from?

A

root word from moon

70
Q

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

A

sun, moon, earth

71
Q

what is an unbra?

A

the darkest pfrtion of the moons shadow

72
Q

what is an penumbra

A

the lightes part of the moon

73
Q

how is the earth, moon, and sun aligned during a lunar eclipse

A

sun, earth, moon

74
Q

how are the depressions on the moon formed?

A

astored, meeterigs, coments mageret,

75
Q

are there mountains on the moon

A

yes

76
Q

which side of the moon is thinker

A

the dark side of the moon is thinker

77
Q

is the mantle if the moon a solid or a liquid

A

solid

78
Q

what did the Clementine spacecraft do? (2 things)

A

Confirmed that the ncrust on the side facing earth is much thiner. provided information on the mineral content of the moon

79
Q

what did the lunar Prospector do?( 3 things)

A

orbif the moon taking photographs,confirmed that the moon has
iron-rich core about 600km in diameter, and collected evidence that supports the presence of water-ice Moon

80
Q

what is the giant impact Theory?

A

Mars sized object collided earth sending dabry into ordet creating a large mass called the moon

phisical science (6 decks)

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