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the Roman god of war
被命名
太阳系
罗马战神
e.g. Venus is named after Venus, the goddess of love .
n. 风暴，暴(风)雨
It is much smaller than the earth. Its diameter is 53% of the earth’s.
直径
During spring and summer, the strong storms can cover the whole surface of Mars. The gravity on its surface is about 40% as strong as it is on earth.
引力，重力
1a Read and understand. Look at the pictures and predict which statements are true about Mars. .
_____ 1. Mars looks like a red ball.
_____ 2. The temperature on Mars is very
high.
_____ 3. Mars is much larger than the
earth.
_____ 4. Mars is too far away for us to
reach.
T
F
F
F
predict
Read and listen to 1a and answer the questions.
(1) What does Mars look like?
It looks like a red and orange ball.
(2) How far is Mars from the sun?
It’s about 228 million kilometers away from the sun.
(3) What’s the temperature on Mars?
It is between -138℃and 28℃.