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Physical Science > chapter 29 > Flashcards

chapter 29 Flashcards

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Biology 101 flashcards
1
Q

what are two factors that affect gravitational stream

A

the mass and distance

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2
Q

which diameter is longer pole to pole or equator

A

equator

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3
Q

what does the magnetic field protect earth from

A

solar flares

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4
Q

the south magnetic pole is located where

A

northern hemisphere

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5
Q

what degree is the earth tilted at

A

11.7 degrees

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6
Q

do the magnetic poles reverse

A

yes

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7
Q

what are the large scale reversals called

A

magnetic reversals

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8
Q

how often do magnetic reversals occur

A

200,000 years

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9
Q

when was the last solar reversal

A

780,000 years ago

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10
Q

what part of the magnetic field deflects harmful radiation

A

the magnetosphere

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11
Q

what are the northern/southern lights called

A

aurora borealis

aurora australis

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12
Q

how are the auroras created

A

electrically charged particles collide with atoms in the atmosphere and emit lights

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13
Q

what month is earth closest to the sun

A

january (147 million km)

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14
Q

what month are we farthest away form the sun

A

july (152 million km)

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15
Q

rotation is perpendicular to the line drawn from the center of Earth to the center of the sun

A

equinox

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16
Q

rotational axis is tilted directly toward the sun or away form the sun

A

solstice

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17
Q

as the plane of earth’s orbit around the sun

A

ecliptic

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18
Q

the motion of earth in an elliptical orbit around the sun

A

revolutions

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19
Q

the spinning of earth on its axis

A

rotation

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20
Q

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

A

time zone

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21
Q

who devised a method of timekeeping around 3000 b.c.

A

Babylonians

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22
Q

what was the symbol for degree taken from

A

sun

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23
Q

how many degrees does the earth spin in one day

A

360

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24
Q

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

A

24

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25
Q

how many degrees does earth spin in one hour

A

15

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26
Q

what direction does the sun rise

A

east

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27
Q

what direction does the sun set

A

west

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28
Q

true or false all time zones are the exact same size

A

false they move around cities states and countries boarders

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29
Q

how many time zones are there in the world

A

24

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30
Q

which direction do you move to add hours to time

A

east

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31
Q

which direction do you move to subtract hours from the time

A

west

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32
Q

how many time zones are in the united states

A

6

33
Q

what are the names of the time zones

A

central mountain pacific eastern Alaska Hawaii

34
Q

what is a solar day

A

noon one day until noon the nest day

35
Q

what is a sidereal day

A

rotation around a different star

36
Q

what are the two main reasons for seasons

A
37
Q

which two seasons have solstice

A
38
Q

which month is the winter solstice

A
39
Q

which month has the summer solstice

A
40
Q

which two seasons are equinox

A
41
Q

which month is the spring equinox

A
42
Q

which month is the fall equinox

A
43
Q

when is the longest day of the year

A
44
Q

when is the shortest day of the year

A
45
Q

when are the days almost 12 hours of day and 12 hours of night

A
46
Q

lunar eclipse

A

occurs when earth passes between the sun and the moon

47
Q

solar eclipse

A

occurs when the moon moves directly between the sun and the earth

48
Q

tide

A

is the rise or fall in the ocean’s surface

49
Q

moon phase

A

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

50
Q

maria

A

are dark colored flat lava filled regions on the moon’s surface

51
Q

regloith

A

is a layer of dusty lunar material produced by collisions

52
Q

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

A

27.3

53
Q

a complete lunar phase cycle takes 29.5 days what is it called

A

`synodic month

54
Q

do we ever see the back side of the moon

A

no

55
Q

what causes a tide to rise or fall

A

gravitational pulls of sun and moon

56
Q

what is the rise of sea level called

A

high tide

57
Q

which is farther from earth the sun or the moon

A

sun

58
Q

does the moon or sun cause a greater affect on tides

A

moon

59
Q

how are they aligned in leap tide

A

sun eartyh moon

60
Q

how are they alinged in neap tide

A

sun earth moon

61
Q

what dies the phase of the moon you see depend on

A

the earyh

62
Q

when does a new moon occur

A

earhh and the sun

63
Q

how many phases of the moon are there

A

8

64
Q

what is the def of waxing moon

A

more lightend up

65
Q

what is the def of waning moon

A

less light

66
Q

what are the moon pashes names

A 
new moom 
waxing cresent 
first quarter
waxing gibbous
full moon
wanning gibbous
3rd
waxing crecengt
67
Q

where is the word month derived from

A

latin

68
Q

what is the alingment in a solar eclipse

A

sun moon earth

69
Q

what is the alignment in a lunar eclipse

A

moon earth sun

70
Q

what is an umbra

A

total eclipse

71
Q

whayt is a penumbra

A

area of particle eclipse

72
Q

how are the depressions on the moon formed

A

craters

73
Q

are there mountains

A

yes

74
Q

which side of the moon is thicker

A

far side

75
Q

is the mantle solid or liquid

A

solid

76
Q

what did the clemintine spacecraft do

A

how thick it was

and mineral content

77
Q

what did the lunar prospector do

A

took pictures
noticed water and ice on moon
iron rich core

78
Q

what is the giant impact theory

A

Physical Science (14 decks)

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