studying for science test Flashcards

(60 cards)

1
Q

In what year did astronomers hypothesize why the moon and planets are shone

A

500 BCE

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2
Q

did they have telescopes in 500 BCE

A

No

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3
Q

what is the largest and brightest object in the night sky

A

the Moon

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4
Q

the moon is only earth’s natural what

A

satellite

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5
Q

what is a satlelite

A

something that orbits earth

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6
Q

what is a star

A

a gaint ball of gas or plasma that is made out of hydrogen and helium

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7
Q

Does the position is stars relative to each other change from out prespective

A

yes but it takes a long time to change a little bit

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8
Q

What are some characteristics of a planet

A

Orbits a star (in our case, the Sun).

Has enough gravity to pull itself into a nearly round shape.

Has cleared its orbit of other debris

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9
Q

how many planets are there in our solar system

A

8

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10
Q

what is a Meteoroid

A

the object while it is still in spacea

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11
Q

what is a Meteor

A

a shooting star kinda thing

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12
Q

what is a meteorite

A

a part of the meteor that enters earths atmosphere

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13
Q

what is a comet

A

icy object that orbits the Sun and is made of dust, rock, and frozen gases.

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14
Q

how does the tail of a comet form

A

ice to vaporize and release gas and dust—this forms a glowing cloud around the nucleus called the coma.

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15
Q

How often does Halleys comet reappear

A

75 years

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16
Q

what year will Halley comet come

A

2061

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17
Q

how many constelltions is the sky divied into

A

88

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18
Q

what do the position of the objects in the sky depend on

A

the rotation of earth

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19
Q

what direction do the stars move throughout the night

A

east to west

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20
Q

During what season is Orin more visible to us

A

winter

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21
Q

what causes seasonal changes

A

earths titlt and orbit

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22
Q

what side to the star slight shift to

A

left

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23
Q

what is the narrow band that the planets move on called

A

ecliptic

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24
Q

why can Mars, Jupiter, and Saturn by visible all night long

A

because of the opposition of these planets

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25
what is the Geocentric Model
that everything revolves around the earth
26
who discovered the Geocentric Model
Aristotle
27
what is heliocentric Model
that everything revoles around the sun and not the earth
28
who discovered this idea
Nicolaus Copernicus
29
what did Nicolaus Copernicus discover
that not everything revoles around the earth
30
what did Tycho Barhe and Joanne Kelper discover
that the Earth moves in an ellipse
31
what did Galileo discover
the telescope
32
what direction does the Earth spin
eastward
33
what is the percentage of the earths tilt
23.5%
34
How long does it take for the Earth to rotate one time
24 hrs
35
what is revolution
the path the earth moves around the sun
36
what is an ellipse
stretched-out circle
37
During what season are we closest to the SUn
winter
38
do you have to be further or closer from the equator to have more seasonal changes
father
39
What about the Earths Axis to do the temperature depend on
the tilt
40
what would happen if the Earth is not titled
we would have no season
41
what is a solstice
when the Sun reaches its highest or lowest point in the sky at noon, resulting in the longest or shortest day of the year.
42
what seasons do they occur
summer and winter
43
what is an equinox
equal day and night lengths across the planet.wh
44
at are the 2 days that this happens
March and September 21
45
what two factors does gravity depend on
mass and distance
46
what is inerita
inertia is the tendency of objects to keep doing what they’re doing
47
What causes the phases of the moon
the position of the moon as it rotates around earth
48
what is maria
the dark flat plains on the moon
49
what are the lighter parts of the moon
lunar highlands
50
what is side of the moon that faces the earth called
near side
51
what is side of the moon that faces the away from the earth
far side
52
what direction does the moon rotate
counterclockwise
53
How long does it take for the moon to rotate one time
27 days
54
what is the order of the moon phases
New Moon Waxing crescent First quarter Waxing Gibbous Full moon Waning Gibous Last quarter Waning cresent
55
what is an eclipse
when the moon is in the way of the sun so you can not see it
56
what is a lunar eclipse
when the earth is in between the Sun and moon having the shadow of the Earth reflect on the moon
57
what is an umbra
the darkest part of the shadow
58
what is a penumbra
lighter, outer part of a shadow
59
what is a Spring tide
higher high tides and lower low tides than normal
60