阅读下面短文，按要求完成下列各题。

What do you know about Mars（火星）? What does it look like?

Mars is the fourth planet from the sun in our solar system（太阳系）and is named after the Roman god of war. Mars goes around the sun at a distance of about 228 million kilometers. You can tell which planet is Mars because it is bright red and looks like a red and orange ball in the night sky. It’s very beautiful. But during spring and summer, the surface of it is covered by strong storms. The gravity（重力）on the surface of Mars is about 2/5 as strong as it is on the earth. So a person who weighs 90 kilos on earth weighs only 36 kilos on Mars. The temperature on Mars is between -138℃ and 28℃. The air has only 0.13% oxygen.

Scientists are still searching for more information about Mars.

【小题1】Who is Mars named after?（根据短文内容回答问题）
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【小题2】How can you tell which planet is Mars?（根据短文内容回答问题）
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【小题3】Why does a person who weighs 90 kilos on the earth weigh only 36 kilos on Mars?
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【小题4】In the passage, the underlined word “it” refers to ________.
【小题5】Do you think people may live on Mars in the future? Why?（不超过20个词）
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