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The Planets in Our Solar System
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by Lisa Milazzo
| 20 Questions
The Sun
About the Sun
The sun is the star at the center of the Solar System. It is a nearly perfect sphere of hot plasma. It is, by far, the most important source of energy for life on Earth. The sun's diameter is about 109 times that of Earth, and its mass is about 330,000 times that of Earth, accounting for about 99.86% of the total mass of the Solar System. About three-quarters of the Sun's mass consists of hydrogen (73%); the rest is mostly helium (25%). The last 2% is made of heavier elements including oxygen, carbon, neon, and iron. The sun is referred to as a Yellow Dwarf star. There are many other Yellow Dwarf stars in the universe. It formed approximately 4.6 billion years ago from a gravitational collapse of matter within an area of a large molecular cloud, a process from which all stars are born. The sun is roughly middle-aged and will remain fairly stable for another five billion years, after which the core of the Sun will experience an increase in density and temperature and transform into a Red Giant. When this happens, the Sun will become large enough to engulf the current orbits of Marcury, Venus, Earth, and possibly all the planets in our Solar System.
1
10 pts
The sun is mostly composed of hydrogen.
True
False
2
10 pts
The mass of the sun is about ______________ times that of Earth.
A 300,000
B 109
C 119
D 330,000
3
10 pts
About how old is the sun and about how long until the sun explodes?
Mercury
4
10 pts
Mercury is the smallest planet.
True
False
5
10 pts
Tell me 2 interesting facts about Mercury you learned from watching the video.
Venus
6
10 pts
Humans could survive on Venus.
True
False
7
10 pts
Why is Venus called "the most deadly planet?" Give at least 2 examples.
Earth, Our Home!
Mars
8
10 pts
How many mission have been to Mars?
A 20
B 14
C 18
D 7
9
10 pts
Mars is about half the size of Earth.
True
False
Jupiter
10
10 pts
Jupiter is how many times the size of Earth?
A 10
B 100
C 1,000
D 10,000
11
10 pts
Jupiter has rings.
True
False
Saturn
12
10 pts
Saturn is the largest planet in the solar system.
True
False
13
10 pts
How many moons does Saturn have?
A 62
B 48
C 74
D 26
Uranus
14
10 pts
Uranus has rings.
True
False
15
10 pts
Uranus is the coldest planet in our solar system.
True
False
Neptune
16
10 pts
Neptune is named after which Roman God?
A The God of War
B The God of the Sky
C The God of Love
D The God of the Sea
17
10 pts
Neptune was discovered by....
A A telescope
B A scientist
C A mathematical prediction
D A satellite
The outlined content above was added from outside of Formative.
18
1 pt
What category does Pluto currently belong in?
A It's still a planet
B Moon
C Star
D Dwarf Planet
19
1 pt
In one or two sentences, explain why Pluto is no longer considered a planet.
20
10 pts
Which planet is the most interesting to you? Why? Be sure your response is at least 3 sentences long.
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