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The Solar System Flashcards

(58 cards)

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1
Q

What is the approximate distance of the Sun from Earth?

A

About 150 million km

This distance is often referred to as 1 Astronomical Unit (AU).

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2
Q

How much larger is the Sun compared to the Moon?

A

About 400 times larger

This size difference is not apparent due to the Sun’s greater distance from Earth.

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3
Q

What is the distance of the Moon from Earth?

A

About 390,000 km

This is the average distance; it can vary slightly due to the Moon’s elliptical orbit.

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4
Q

Which planet is closest to the Sun?

A

Mercury

Mercury is the smallest planet in the solar system.

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5
Q

What is the distance of Mercury from the Sun?

A

About 60 million km

This makes Mercury the closest planet to the Sun.

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6
Q

What is the distance of Neptune from the Sun?

A

About 4500 million km

This distance illustrates the vastness of our solar system.

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7
Q

If drawn to scale, how far would Neptune be from the Sun in a diagram?

A

150 meters

This emphasizes the challenge of representing distances in space accurately.

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8
Q

True or False: The Moon and the Sun appear to be the same size from Earth.

A

True

This is due to the relative distances and sizes of the two celestial bodies.

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9
Q

List the four types of planets in the solar system based on their distance from the Sun.

A
  • Small planets close to the Sun
  • Bigger planets further away
  • Gas giants
  • Ice giants

The categorization helps in understanding the structure of the solar system.

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10
Q

What is the duration of one complete turn on Earth’s axis?

A

24 hours

This is also known as 1 Earth day.

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11
Q

How long does it take for Earth to orbit around the Sun?

A

365¼ days

This period is also referred to as 1 Earth year.

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12
Q

How long does Saturn take to complete one turn on its axis?

A

10.2 Earth hours

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13
Q

What is the orbital period of Saturn around the Sun?

A

29.5 Earth years

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14
Q

How many moons does Saturn have?

A

82 Moons

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15
Q

What is the composition of Saturn?

A

Consists of gases

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16
Q

How long does it take Mercury to complete one turn on its axis?

A

58.7 Earth days

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17
Q

What is the orbital period of Mercury around the Sun?

A

88 Earth days

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18
Q

How many moons does Mercury have?

A

No Moons

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19
Q

What is the duration of one complete turn on Venus’s axis?

A

243 Earth days

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20
Q

What is unique about Venus’s rotation direction?

A

It rotates in the opposite direction to most other planets

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21
Q

How long does it take Venus to orbit around the Sun?

A

225 Earth days

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22
Q

How many moons does Venus have?

A

No Moons

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23
Q

How long does Mars take to complete one turn on its axis?

A

24.62 Earth hours

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24
Q

What is the orbital period of Mars around the Sun?

Study These Flashcards
A

687 Earth days

25
What are the names of Mars's moons?
Phobos and Deimos
26
How long does Jupiter take to complete one turn on its axis?
9.8 Earth hours
27
What is the orbital period of Jupiter around the Sun?
11.9 Earth years
28
How many moons does Jupiter have?
At least 79 Moons
29
What is the name of Jupiter's largest moon?
Ganymede
30
What is unique about Ganymede compared to Mercury?
Ganymede is larger than planet Mercury
31
What is the composition of Jupiter?
Consists of gases
32
How long does Uranus take to complete one turn on its axis?
10.2 Earth hours
33
What is the orbital period of Uranus around the Sun?
29.5 Earth years
34
How many moons does Uranus have?
27 Moons
35
What is the composition of Uranus?
Consists almost entirely of ice
36
How long does Neptune take to complete one turn on its axis?
19.1 Earth hours
37
What is the orbital period of Neptune around the Sun?
164.8 Earth years
38
How many moons does Neptune have?
14 Moons
39
What is the composition of Neptune?
Consists almost entirely of ice
40
How long does the Sun take to turn at its equator?
25 Earth days
41
How many moons does Earth have?
One
42
How long does it take for the Moon to complete its orbit around the Earth?
29.5 days
43
What do we call the time it takes for the Moon to orbit the Earth?
A month
44
What is the term for when we can see none of the lit up half of the Moon?
New Moon
45
What do we call the phase when we can see all of the lit up half of the Moon?
Full Moon
46
What are the phases called when we can see half of the lit up half of the Moon?
Quarter Moons
47
What is the term for the part of the lit up half of the Moon that we can see from Earth?
Phase of the Moon
48
How many phases of the Moon can we see from Earth during a period of 29.5 days?
All phases
49
Fill in the blank: The Moon takes _______ days to orbit the Earth.
29.5
50
True or False: A full Moon occurs when we can see none of the lit up half of the Moon.
False
51
What are the Moon's positions during the Quarter Moons?
Positions C and G ## Footnote These positions indicate the stages of the Moon's phases.
52
What does it mean when we say the Moon is waxing?
The Moon is appearing larger every night ## Footnote This phase occurs from the new Moon to the full Moon.
53
What does it mean when we say the Moon is waning?
The Moon is appearing smaller every night ## Footnote This phase occurs from the full Moon to the new Moon.
54
Define a crescent shape.
Less than a half circle ## Footnote This refers to the visual appearance of the Moon during certain phases.
55
Define a gibbous shape.
More than a half circle ## Footnote This describes the Moon's appearance when it is nearly full.
56
What is the visibility of the Moon during Quarter Moons?
Half of the Moon is lit ## Footnote This is why we can see half of half of the Moon.
57
Fill in the blank: The Moon appears larger every night during the ______ phase.
[waxing]
58
Fill in the blank: The Moon appears smaller every night during the ______ phase.
[waning]

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