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physical science > ch 29 > Flashcards

ch 29 Flashcards

1
Q

sphere

A

is a round, three dimensional object

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2
Q

ellipse

A

is an elongated, closed curve with two foci

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3
Q

what were some ancient observations to prove the earth is a sphere=-

A

objects fall down towards to the surface to the shadow of the moon and people form from different parts of the earth see different stars

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4
Q

what are two factors that affect gravitational pull

A

the mass of the object of and the distance

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5
Q

what diameter of earth is longer

A

equator

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6
Q

what does the magnetic field protect the earth from

A

harmful radation

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7
Q

which magnetic pole is located in the hemisphere

A

the south magnetic pole

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8
Q

at what degrees is earths axis titled

A

11.7

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9
Q

when was the last magnetic reversal

A

200,000 years ago

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10
Q

within earth’s magnetic field what part has left solar radiation

A

magnetosphere

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11
Q

what are the scientific names of the northern lights and the southern lights

A

aurora borealis and aurora austrialis

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12
Q

who devised a method of timekeeping around 3000 B.C

A

the babylonians

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13
Q

What was the symbol for degrees taken from

A

taken from the Babylonians from the symbol of the sun

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14
Q

how many degrees does the earth spin in one day

A

360 degrees

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15
Q

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

A

24 hours

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16
Q

how many degrees does the earth spin in one in hour

A

15 degrees

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17
Q

what direction does the sun rise

A

east

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18
Q

what direction does the sun set

A

west

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19
Q

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

A

false

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20
Q

how many time zones are therein the world

A

24 time zones

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21
Q

which direction do you move to add hours to the time

A

east

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22
Q

which direction do you move to subtract hours from the time

A

west

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23
Q

how many time zones are there in the united states`

A

six time zones

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24
Q

what are the name of the time zones

A

Eastern, Pacific , Central America, Central , Hawaiian/mountainous time zone

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25
Q

what is solar day

A

the time between successive meridian transits of the sun at a particular place.

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26
Q

what is sidereal day

A

the time between two consecutive transits of the First Point of Aries

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27
Q

what are two main reasons for seasons

A

the tilt of a planet’s axis and its orbit around the sun.

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28
Q

which 2 seasons have a solstice

A

summer and winter

29
Q

which month is the summer solstice

A

june

30
Q

which month is the winter solstice

A

December

31
Q

which two season are the equinox

A

March and September

32
Q

which month is the spring equinox

A

march

33
Q

which month is the fall equinox

A

september

34
Q

when is the longest day of the year

A

Tuesday, June 21

35
Q

when is the shortest day of the year

A

Wednesday, December 21

36
Q

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

A

September 22

37
Q

tide

A

is a rise or fall in the ocean surface

38
Q

moon phase

A

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

39
Q

solar eclipse

A

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

40
Q

lunar eclipse

A

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

41
Q

maria

A

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

42
Q

regolith

A

is a layer of dusty lunar material produced by collisions between asteroids and comets and the moon

43
Q

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

A

27 days

44
Q

a completer lunar phase cycle takes 29.5, what is this called

A

synodic month

45
Q

do we ever see the back side of the moon

A

no

46
Q

what causes a tide to rise or fall

A

the gravitational forces exerted on the earth by the moon, and to a lesser extent, the sun

47
Q

what is the rise of sea level called

A

high tide

48
Q

after the sea level rise how many hours does it take the sea level to drop

A

six

49
Q

which is further from earth the sun or the moon

A

sun

50
Q

does the moon or the sun cause a greater effect on the earth

A

the sun’s gravitational attraction to the Earth is more than 177 times greater than that of the moon to the Earth

51
Q

how are the sun, the earth, and the moon aligned for a spring tide

A

the sun the moon and the earth aligned

52
Q

how are the sun, the earth, and the moon aligned for a neap tide

A

an L

53
Q

what does the phase of the moon you see depend on

A

the sunlight

54
Q

when does a new moon occur

A

when the moon is the between the earth and the sun

55
Q

how many phases of the moon are there

A

8

56
Q

what is the definition of the waxing phase

A

the illuminated portion we see appears more

57
Q

what is the definition waning phases

A

the illumination gets lets brighter

58
Q

what are the moon phases name

A

new, wanning crescent, 3rd quarter, waxing gibbous, full, waxing gibbous, 1st quarter

59
Q

where is the word month delivered from

A

a German word that means moon

60
Q

how is the earth moon and the sun aligned for the solar eclipse

A

when moon is between the earth and the sun

61
Q

what is umbra

A

is the shadow of the moon

62
Q

what is penumbra

A

partial eclipse

63
Q

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

A

sun moon earth

64
Q

how are the depressions on the moon formed

A

from asteriods

65
Q

are there mountains on the moon

A

yes

66
Q

which side of the moon thicker

A

the dark side

67
Q

is the mantle of the moon a solid or liquid

A

solid

68
Q

what did the clementine spacecraft do

A

it confirmed the mineral content of moon rooks

69
Q

what did the lunar prospector do

A

took surface photos of the moon confirmed the moon had a solid iron core of water and ice on the moon

physical science (8 decks)

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