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planet,?crowded,?polluted,?rapid,?increase,?passenger,?uncomfortable,?oxygen,?tasty,?challenging,?rapidly,?all?over?again,??in?the?form?of,?compare.
New structures:
Food?would?most?probably?in?the?form?of?pills?and?would?not?be?so?tasty.?
The?gravity?on?Mars?is?only?about?three-eighths?of?that?on?the?Earth.?
Compared?with?life?on?the?Earth,?people?would?have?more?space.?New?structures:?
III. Focus of the lesson and predicted area of difficulty
Learn?about?what?life?would?be?like?on?another?planet?in?the?future.
Talk?about?the?advantages?and?disadvantages?of?living?on?Mars?and?Earth.
IV. Teaching procedures
Step 1 Before reading
T:Where are Eddie and Hobo? What are they doing.
S: They are on Mars.They are having an interplanetary travel
T: How much do you know about Mars? Let’s do a quiz.
1.The color of Mars is_________. .
A. red B. blue
2. Mars is _________. than the Earth.
A. bigger B. smaller
3. Most of the atmosphere on Mars is_________. .
A. oxygenB. carbon dioxide
4. Compared to the Earth, Mars is _________ the Sun.
A. closer to B. farther away from
5. There is _________.gravity on Mars than that on the Earth.
A. less B. more
T: (Show the picture of our solar system) Many people dream to travel to Mars.Why do they choose Mars?
S: Because it is the closet the closet planet to Earth.
【设计意图：引入开门见山，从本单元讨论的话题开始，设计关于火星练习题，复习所学知识的同时，为新课的学习做好准备。再通过展示太阳系的图片，引导学生认真看图，认真思考，得出结论。】
Step 2 While reading
T:（Play a video from “Martians”）Mark Watney, an American astronaut, was left behind on Mars. So he had to live on Mars by himself until his crew members came back to save him.
Do you think it is possible for him to survive on Mars?
What kind of difficulties would he possibly meet?