chapter 29 Flashcards

(69 cards)

1
Q

is a round, three dimensional object, the surface of which is the same distance from the center in all directions.

A

sphere

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2
Q

is an elongated, closed curve with two foci.

A

ellipse

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3
Q

is earth a perfect sphere?

A

no, the equater is long than pole to pole

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4
Q

what are some of the ancient observations that tell us earth is a sphere

A

gravity,lunar eclipse,people in different parts of the world see different stars

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5
Q

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

A

time zone

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6
Q

is a spinning of earth on its axis, each line drawn from earth’s north pole to it;a south pole.

A

rotation

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7
Q

is the motion of earth in an elliptical orbit around the sun.

A

revolution

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8
Q

is defined as the plane of earths orbit around the sun.

A

ecliptic

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9
Q

occurs when earths rotational axis is tilted directly toward the sun or away from the sun.

A

solstice

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10
Q

earths 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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11
Q

false, they are modified to fit around cities,states,and country borders, and other key sites

A

true or false? all time zones are the exact same size?

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12
Q

Babylonians

A

who devised a method of timekeeping around 300 B.C.?

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13
Q

Babylonians symbol for the sun

A

what was the symbol for degree taken from?

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14
Q

360 degrees

A

how many degrees does the earth spin in one hour?

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15
Q

24 hours

A

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

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16
Q

15 degrees

A

how many degrees does the earth spin in one hour?

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17
Q

east

A

what direction does the sun rise?

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18
Q

west

A

what direction does the sun set?

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19
Q

24 total

A

how many time zones are there in the world?

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20
Q

east

A

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

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21
Q

west

A

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

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22
Q

6 time zones

A

how many time zones are there in the united states?

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23
Q
eastern time
central time
mountain time
pacific time
Atlantic/Atlanta time
Hawaiian time
A

what are the names of the time zones?

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24
Q

when the sun is directly above us @noon till the next day its above us @noon (noon-to-noon)

A

what is a solar day?

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25
when earth rotates based on a star
what is a sidereal day?
26
earths tilt and the orbit around the sun
what are the two min reasons for seasons?
27
summer and winter
which 2 seasons have a solstice?
28
June 21
which months is the summer solstice?
29
December 21
which month is the winter solstice?
30
spring & fall
which two seasons are equinoxes?
31
march 20 or 21
which month is the spring equinox?
32
September 22 or 23
which month is the fall equinox?
33
summer solstice June 21
when is longest day of the year?
34
winter solstice Decemeber 21
when is the shortest day of the year?
35
spring and fall March and September
when are the days almost 12 hours of the day and 12 hours of the night?
36
is a rise or fall in the ocean surface
tide
37
reflects the change i appearance of the moon as seen on earth
moon phase
38
occurs when the moon moves directly between the sun and earth and casts a shadow on earth
solar eclipse
39
occurs when earth passes between the sun and the moon and casts a shadow on the moon
lunar eclipse
40
are the dark-colored,flat,lava-filled regions on the moon's surface
maria
41
is a layer of dusty lunar material
regolith
42
27.3 days
how many days does it take the moon to revolve around earth?
43
synodic month
a complete lunar phase cycle takes 29.5 days, what is this called?
44
no, you can only see one side
do we ever see the back side of the moon?
45
gravitational pull from the moon and sun
what causes a tide to rise or fall?
46
high tide
what is the rise of sea level called?
47
6 hours later
after the sea level rises how many hours does it take for the sea level to drope?
48
sun
which is farther from earth, the sun or moon?
49
moon
does the moon or the sun cause a greater effect on earths tide?
50
sun, earth, and moon are in a straight line
how are the sun,the earth,and the moon aligned for a spring tide?
51
an L shape 90 degree angel
how are the sun,the earth, and the moon aligned for a neap tide?
52
positions of the moon earth and sun relative to one another
what does the phase of the moon you see depend on?
53
when the moon is between the earth and the sun
when does our new moon occur?
54
8 phases
how many phases of the moon are there?
55
the illuminated portion of the moon become larger each night
what is the definition of the waxing phases?
56
the illuminated starts to get smaller as the night go on
what is the definition of the waning phases?
57
new moon,waxing crescent,1st quarter, waxing gibbous,full moon, waning gibbous,3rd quarter, waning crescent
what are the moon phases names?
58
same root as moon
where is the word month derived from?
59
sun, moon, earth (in that order)
how is the earth,moon, and sun aligned during solar eclipse?
60
shadow where a total eclipse occurs
what is an umbra?
61
part of an eclipse/lighter shadow where the moon is blocking out the sun
what is a penumbra?
62
earth is between the sun and the moon
how is the earth, moon, and sun aligned during a lunar eclipse?
63
meteorites, asteroids,and comets
how are the depressions on the moon formed?
64
yes
are there mountains on the moon?
65
further side/dark side
which side of the moon is thicker?
66
solid
is the mantle of the moon a solid or a liquid?
67
what did the clementine spacecraft do? (2things)
68
what did the lunar prospector do? (3things)
69
what is the giant impact theory?