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Questions and Answers
Which planet is colder?
Which planet is about half the size of Earth?
Which planet has a slightly longer day than Earth?
Which planet probably had oceans in the past?
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Which planet has about 1% as much air as Earth?
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Which planet has higher gravity than the Moon?
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What is Earth's air mostly made up of?
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Which planet is called the red planet?
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Which planet is further away from the Sun than Earth?
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Which planet has only about 38% of Earth's gravity?
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Study Notes
- Mars is much colder than Earth, with temperatures around -55 degrees Celsius.
- Mars is further away from the Sun than Earth, but the difference is not significant when measured in astronomical units.
- Mars is about half the size of Earth.
- The length of a day on Mars is slightly longer than on Earth.
- Mars probably had oceans in the past, but most of the water there now is frozen.
- Mars has about 1% as much air as Earth, mostly carbon dioxide.
- Mars has higher gravity than the Moon but only about 38% of Earth's gravity.
- Earth's air is mostly nitrogen and oxygen.
- Earth is called the blue planet and Mars is called the red planet.
- The students are discussing the similarities and differences between Mars and Earth.
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