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九上U4T3SC.ppt


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九上U4T3SC.ppt
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Unit 4 Amazing Science
Section C
Topic 3 I don't think aliens can be found in space.




How beautiful and lively the earth is !
Is it our only home? Talk about your ideas.



Pre-reading questions
1. What does Mars look like?
2. Why do people explore Mars?
3. How much oxygen does the air on Mars have?





Solar system
Mars is the fourth planet from the sun in our solar system and is named after Mars, the Roman god of war.








A circle is divided into two halves by
diameter.
circle
diameter



Roman adj. 古罗马的,罗马帝国的
n. 古罗马人,罗马人
1. Do in Rome as the
Romans do .

2. All roads lead to Rome.




storm 暴风(雨)
But during spring and summer, strong storms can cover the whole surface of Mars.




Important points:
It is reported that … 据报道(悉、传说)
It is said that … 据说
It is known that … 众所周知
It is given out that … 据称



1a Read and understand

(1) What does Mars look like?
(2) How far is Mars from the sun?
(3) What’s the temperature on Mars?



1b Work alone
Diameter: _________________________
Color: ____________________________
Shape: ___________________________
Climate: __________________________________
_____________________________________________

Gravity: __________________________

Distance from the sun: ______________
_________________________________
It is 53% as wide as that of the earth.
It is red and orange.
It looks like a ball.
During spring and summer, strong storms can cover the whole surface of Mars.The temperature is between -138℃ and 28℃.
It is about two-fifths as strong as it is on earth.
Mars goes around the sun
at a distance of about 228 million kilometers.
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