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Quiz: Test your Mars knowledge
Mars study guide
1. How much of Mars’ atmosphere is made up of carbon dioxide?
3 percent
50 percent
96.5 percent
2. How low can the temperature get during a cold day on Mars?
35° Fahrenheit
-30° Fahrenheit
-225° Fahrenheit
3. How big is Mars?
About half the size of Earth
About a quarter of the size of Earth
About twice as big as Earth
4. Does Mars have seasons?
Yes
No
5. In 1938, Orson Welles broadcast a radio play about a Martian invasion of New Jersey that many listeners thought was real. What novel was the play based on?
"Fahrenheit 451" by Ray Bradbury
"The War of the Worlds" by H. G. Wells
"Brave New Word" by Aldous Huxley
6. What was the name of the first spacecraft to orbit Mars?
Odyssey 1
Mariner 9
Viking Lander I
7. How long is each Martian year?
687 Earth days
365 Earth days
501 Earth days
8. What form of life do scientists speculate might live on the planet?
Little green men
Cockroaches
Microbes
Source: NASA, CNN
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