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北师大2003课标版《Lesson 3 Clean Machines》集体备课PPT课件优质课下载
dryer
distiller
...
lamps and lanterns
portable power source
crop production
electricity for artificial satellite
...
use heat of the sun
use light of the sun
Enjoy:what are they doing?
They are racing a car
Interview:find your peer
1.Well ,the first question I have for you is simple. What is a solar car?
Solar cars are cars that use the sun’s energy for power. That means they don’t use petrol, gas or any other fuel, just the sunlight.
People have been worried about pollution caused by fuels like petrol and gas for a long time now. Solar cars are clean and safe, so there is a lot of interest in them.
Well, I’ve been interested in cars since kindergarten. When I was at university , I started designing my car, I’ve designed five or six different cars so far. And I’ve been taking part in races for about four years.
Let me think. Six. We’ve won two of them!
Well, the one I like best crosses the whole of Australia from northwest to southeast. It’s about 4,500km long!
These days the fastest cars can do it in six days.
I’ve been building a new car with a team from Queensland University. We’ve done a lot of work on it, but we haven’t finished yet.
Well, so far I’ve only written the first few chapters! I want people to have a good impression of solar cars.
Solar cars are getting better all the time. They have reached speeds of nearly 80k.p.h. In tests, one car we built has averaged over 40k.p.h., even in cloudy weather.
Discuss:true or false
1.Marie Logan began designing cars when she was a student.