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physical science > ch 29 > Flashcards

ch 29 Flashcards

(69 cards)

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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
what is solar day
the time between successive meridian transits of the sun at a particular place.
26
what is sidereal day
the time between two consecutive transits of the First Point of Aries
27
what are two main reasons for seasons
the tilt of a planet's axis and its orbit around the sun.
28
which 2 seasons have a solstice
summer and winter
29
which month is the summer solstice
june
30
which month is the winter solstice
December
31
which two season are the equinox
March and September
32
which month is the spring equinox
march
33
which month is the fall equinox
september
34
when is the longest day of the year
Tuesday, June 21
35
when is the shortest day of the year
Wednesday, December 21
36
when are the days almost 12 hours of day and 12 hours of night
September 22
37
tide
is a rise or fall in the ocean surface
38
moon phase
reflects the change in appearance of the moon as seen from earth
39
solar eclipse
occurs when the moon moves directly between the sun and the earth
40
lunar eclipse
occurs when earth passes between the sun and the moon and casts a shadow and on the moon
41
maria
are the dark colored flat, lava-filled regions on the moon's surface
42
regolith
is a layer of dusty lunar material produced by collisions between asteroids and comets and the moon
43
how many days does it take the moon to revolve around the earth
27 days
44
a completer lunar phase cycle takes 29.5, what is this called
synodic month
45
do we ever see the back side of the moon
no
46
what causes a tide to rise or fall
the gravitational forces exerted on the earth by the moon, and to a lesser extent, the sun
47
what is the rise of sea level called
high tide
48
after the sea level rise how many hours does it take the sea level to drop
six
49
which is further from earth the sun or the moon
sun
50
does the moon or the sun cause a greater effect on the earth
the sun's gravitational attraction to the Earth is more than 177 times greater than that of the moon to the Earth
51
how are the sun, the earth, and the moon aligned for a spring tide
the sun the moon and the earth aligned
52
how are the sun, the earth, and the moon aligned for a neap tide
an L
53
what does the phase of the moon you see depend on
the sunlight
54
when does a new moon occur
when the moon is the between the earth and the sun
55
how many phases of the moon are there
8
56
what is the definition of the waxing phase
the illuminated portion we see appears more
57
what is the definition waning phases
the illumination gets lets brighter
58
what are the moon phases name
new, wanning crescent, 3rd quarter, waxing gibbous, full, waxing gibbous, 1st quarter
59
where is the word month delivered from
a German word that means moon
60
how is the earth moon and the sun aligned for the solar eclipse
when moon is between the earth and the sun
61
what is umbra
is the shadow of the moon
62
what is penumbra
partial eclipse
63
how is the earth moon and the sun aligned during the lunar eclipse
sun moon earth
64
how are the depressions on the moon formed
from asteriods
65
are there mountains on the moon
yes
66
which side of the moon thicker
the dark side
67
is the mantle of the moon a solid or liquid
solid
68
what did the clementine spacecraft do
it confirmed the mineral content of moon rooks
69
what did the lunar prospector do
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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