We live on Planet Earth, the third planet from the sun. But think about this, what if we lived on the fourth planet from the sun—Mars? Earth and Mars both belong to the solar system. There are many things about them that are the same and different. Let’s compare them and think about how different things would be if we lived on Mars.
Facts |
Earth |
Mars |
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Orbit(轨道) around the sun |
Moves at about 99,999 kilometers per hour Takes 365 days to make one trip around the sun Earth always keeps the same distance from the sun |
Moves at 87,226 kilometres per hour Takes 687 Earth days to make one trip around the sun Mars is not always the same distance from the sun. It is 205,996,032 kilometres from the sun when it is closest. It is 249,448,320 kilometres from the sun when it is furthest away. |
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Seasons |
Autumn |
about 90 days |
146 days |
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Winter |
about 90 days |
160 days |
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Spring |
about 90 days |
199 days |
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Summer |
about 90 days |
90 days |
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Length of Day |
24 hours |
24 hours, 7 minutes |
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Gravity |
A 45-kilogram person on Earth would feel 62% lighter in weight because there is less gravity at the Martian surface. That is about 17 kilograms. |
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Atmosphere |
21% oxygen |
95% carbon dioxide – no oxygen |
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Number of Moons |
One |
Two |
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How many kilometers does Earth move every hour?
A.99,999. | B.87,226. | C.205,996,032. | D.249,448,320. |
How many Earth days does it take Mars to make a trip around the sun?
A.365. | B.322. | C.687. | D.1052. |
.On Mars and Earth, which season has the same length?
A.Spring. | B.Summer. | C.Autumn. | D.Winter. |
A person feel lighter on Mars than on Earth because .
A.there is less gravity on Earth |
B.there is less gravity on Mars |
C.there is more oxygen on Earth |
D.there is more oxygen on Mars |
The following facts are mentioned to compare Earth to Mars except .
A.Length of Day | B.Numbers of Moons |
C.Orbit around the sun | D.Size of Earth and Mars |