Space Flashcards
(105 cards)
1
Q
What is the Sun?
A
a star
2
Q
What do the planets orbit?
A
the Sun
3
Q
Where is the Sun in our Solar System?
A
the centre
4
Q
What is the largest object in our Solar System?
A
the Sun
5
Q
Which object has the largest gravitational pull?
A
the Sun
6
Q
How much of the total mass of the Solar System does the Sun take up?
A
99.8%
7
Q
How many Earths would make up the Sun?
A
1.3 million
8
Q
How hot is the visible edge of the Sun?
A
5,500°C
9
Q
How hot is the core of the Sun?
A
15 million °C
10
Q
How old is the Sun suspected to be?
A
4.6 billion years old
11
Q
How far is the Sun through its life cycle?
A
halfway
12
Q
How long does it take light to reach the Earth from the Sun?
A
8 minutes (20 seconds)
13
Q
A solar eclipse is when the Moon/Sun passes in between the Moon/Sun and the Earth?
A
Moon, Sun
14
Q
What is a partial solar eclipse?
A
Where some of the Sun is still visible as the Moon passes?
14
Q
What are the 4 inner planets made mostly of?
A
metals
14
Q
How many stars are in the Solar System?
A
1, the Sun
14
Q
How many planets are there?
A
8
15
Q
What are the 4 outer planets known as?
A
gas giants
16
Q
What are the 4 inner planets?
A
Mercury, Venus, Earth, Mars
17
Q
Which is the smallest planet?
A
Mercury
18
Q
Which planet has a thick carbon dioxide atmosphere?
A
Venus
19
Q
Which planet is the only planet with life?
A
Earth
20
Q
Which is the furthest inner planet from the Sun?
A
Mars
21
Q
What are the 4 outer planets?
A
Jupiter, Saturn, Uranus, Neptune
22
What is the largest planet in the Solar System?
Jupiter
23
Which planet currently has a storm system larger then the Earth?
Jupiter
24
How long has the storm system on Jupiter been going on for?
over 400 years
25
How many rings surround Saturn?
7
26
Which planet has a lot of moons and takes 84 years to orbit the Sun?
Uranus
27
Which planet is the furthest planet from the Sun?
Neptune
28
Meteoroids are smaller than _________.
asteroids
29
What do meteoroids orbit?
the Sun
30
When a meteoroid enters the atmosphere and burns up what is it called?
a meteor
31
When a meteor streaks through the sky what is it commonly known as?
a shooting sky
32
If a small piece of meteoroid reaches the Earth's surface what is it called?
a meteorite
33
How many dwarf planets are in our solar system?
5
34
How many moons are in our solar system?
over 180
35
How many asteroids are in our solar system?
566,000
36
Where are the asteroids in our solar system contained?
the asteroid belt
37
How many comets are in our solar system?
3000
38
What are comets made from?
dust and ice
39
How long ago was the solar system thought to be formed?
4.6 billion years ago
40
The modern model of the Universe is called what?
The 'Heliocentric Model'
41
Humans can put __________ in space to orbit the Earth.
satellites
42
How long was the Milky Way thought to have been formed?
13.6 billion years ago
43
The Milky Way is moving/stationary.
moving
44
How many stars are in the Milky Way?
over 100 billion
45
What is a constellation?
A group of stars that form a pattern.
46
After a star explodes, it can form a _____.
black hole
47
There is a black hole where in the Milky Way?
the centre
48
How far is the 2nd nearest star from us?
4.4 light years
49
How many galaxies are in our Universe at least?
100 billion
50
How many stars are each galaxy thought to contain?
100 billion
51
How many stars COULD you view on a clear night?
5000
52
What are stars formed in?
nebulae
53
What do stars use as a fuel?
hydrogen gas
53
What are nebulae?
clouds of dust and gas
54
What do stars convert hydrogen gas into?
helium
55
Large stars exploding in a large explosion causes what?
a supernova
56
What happens when stars run out of helium?
They die.
57
After a star explodes as a supernova, what can it form?
a black hole
58
What does the Big Bang Theory say?
That all matter was created in a large explosion.
59
Before the Big Bang, what was everything we see focused in?
a tiny point
60
Is the point from the big bang still expanding?
yes
61
As the universe expands, it slowly _____.
cools
62
What are galaxies held together by?
gravitational forces
63
What is the nearest galaxy after the Milky Way called?
Andromeda
64
Why are we unable to see most galaxies?
They are too far away.
65
What type of galaxy is the Milky Way?
spiral
66
What 3 types of galaxy are there?
spiral, elliptical and irregular
67
The Earth is tilted at an angle of __ degrees.
23.5
68
Why do we have 4 seasons?
The Earth's tilt.
69
The Earth rotates on its ____.
axis
70
The Earth's axis always points in the opposite direction/ the same direction as the Earth orbits the Sun.
the same direction
71
Why does the Sun appear higher in the sky in the summer?
The Earth's tilt.
72
When the tilt of the Earth is facing the Sun, it is summer in the Southern/ Northern Hemisphere.
Northern
73
When the tilt faces away from the Sun, it is summer in the Southern/ Northern Hemisphere.
Southern
74
What is the longest day of the year called?
The summer solstice
75
What is the shortest day of the year called?
The winter solstice
76
What makes a day?
The time the Earth takes to rotate on its axis.
77
Daytime is when the Sun's rays are facing which half of the Earth?
The half of the Earth that you are on.
78
Night time is when the Sun's rays are facing which half of the Earth?
The half that you are not on.
79
Do all planets have different day lengths?
yes
80
Which planet has the shortest day?
Jupiter
81
Which planet has the longest day?
Venus
82
How many full orbits of the Sun does the Earth complete per year?
1
83
Do all planets take the same amount of time to orbit the Sun?
no
84
The nearer you are to the Sun, the longer/shorter the planet's day will be.
shorter
85
What is the side of the Moon we don't see known as?
'the dark side of the Moon'
86
If you look at the moon from a different hemisphere, how will it appear?
upside down
87
True of false: the Moon moves further away from the Earth every year.
true
88
How do we see the moon in the night sky?
It reflects the Sun's light to us.
89
The Moon is a _______ satellite.
natural
89
What does the Moon orbit?
The Earth.
90
What causes a lunar eclipse?
The Earth being between the Sun and the Moon.
91
What happens when the Earth casts it's shadow on the Moon?
a lunar eclipse
92
What type of Moon is there when there is a lunar eclipse?
full moon
93
How long does it take the Moon to make one complete orbit around the Earth?
28 days
94
Why does the Moon appear to be different shapes?
As the Moon moves around the Earth, we see it from different positions.
95
Where does the light we see on Earth come from?
the Sun
96
How many miles are between the Earth and the Sun?
93 million
97
What speed does light travel at?
300,000,000 metres per second
98
What is a light year?
The distance light travels in 1 year.
99
How much distance is a light year?
9.5 trillion km
100
How long does the light from our 2nd nearest star take to reach us?
over 4 years
