Unit 4 Amazing Science
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.
1. What does Mars look like?
2. Why do people explore Mars?
3. How much oxygen does the air on Mars have?
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
Roman adj. 古罗马的，罗马帝国的
1. Do in Rome as the
Romans do .
2. All roads lead to Rome.
But during spring and summer, strong storms can cover the whole surface of Mars.
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
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.