bchapter3prereadingelectricity開課課件

1、bchapter3prereadingelectricity開 課課件 bchapter3prereadingelectricity開 課課件 bchapter3prereadingelectricity開 課課件 How many electrical appliances have we got ? bchapter3prereadingelectricity開 課課件 air conditioner computer telephonerice cooker vacuum cleaner fridge microwave oven camera juicer TV torch hair

2、dryer fan washing machine recorder iron heatercell phone DVD kettle bchapter3prereadingelectricity開 課課件 ElectricityElectricity .a kind of energy bchapter3prereadingelectricity開 課課件 Can you see electricity ? No, We cant . Electricity is invisible.（看不見的）（看不見的） No, we cant . It is dangerous . Can you f

3、eel electricity with your hands ? We should be careful with it. bchapter3prereadingelectricity開 課課件 We can change electricity into energy that we can see light energy .can produce light energy. We can change electricity into energy that we can hear sound energy .can produce sound energy. bchapter3pr

4、ereadingelectricity開 課課件 We change electricity into energy that can move things moving energy .can produce moving energy. bchapter3prereadingelectricity開 課課件 We can change electricity into energy that we can feel heat energy .can produce heat energy. bchapter3prereadingelectricity開 課課件 sound energy

5、light energy heat energy moving energy Four kinds of energy sound energy heat energy light energy moving energy Match the things and the kinds of energy. (Some things may have more than one kind of energy. bchapter3prereadingelectricity開 課課件 Which electrical appliance produces sound energy? bchapter

6、3prereadingelectricity開 課課件 bchapter3prereadingelectricity開 課課件 How many electrical appliances can produce heat energy? bchapter3prereadingelectricity開 課課件 bchapter3prereadingelectricity開 課課件 How many electrical appliances can produce sound energy? bchapter3prereadingelectricity開 課課件 bchapter3prerea

7、dingelectricity開 課課件 1 2 3 4 5 6 7 8 _ _ _ _ _ _ _ _ can produce energy. bchapter3prereadingelectricity開 課課件 A: What do we use electricity to do? B: We use electricity to cook rice. C: We use to do Group work: These electrical appliances can use different kinds of energy to work for us. D: We use to

8、 do bchapter3prereadingelectricity開 課課件 a good servant Electricity ( someone who does housework for money) bchapter3prereadingelectricity開 課課件 a dangerous servant Electricity bchapter3prereadingelectricity開 課課件 B1 Before you read the story on the next page, look at the title, the first and last two

9、paragraphs and the pictures. bchapter3prereadingelectricity開 課課件 One evening, Daisy said, Im going to buy a packet of sweets. Does anyone want anything? Benny, Daisys brother, said, Yes. Can you get me a packet of electricity, please? Daisy asked, Didnt you know that, Benny? Mum said, Whos looking f

10、oolish now, Benny? bchapter3prereadingelectricity開 課課件 Try to answer these questions. 1.What did the girl want to buy? A packet of sweets. 2.Who is looking foolish? Benny is looking foolish. 3. Who or what is the servant in the title ? Electricity is the servant in the title. 4.Why is the servant in

11、 the title dangerous? If we dont use electricity carefully, we will get hurt. If we arent careful with electricity , it will hurt us. bchapter3prereadingelectricity開 課課件 bchapter3prereadingelectricity開 課課件 bchapter3prereadingelectricity開 課課件 We must not_ _than we need. We must_ when we leave a room. 1.2. turn on more lights turn fans off bchapter3prereadingelectricity開 課課件 We must not_ _when we boil water. We must_ after we have taken something out. 3.4. kettle open leave theclose the fridge bchapter3prereadingelectricity開 課