Shang Hong Liu Fang

1. electricity A dangerous servant Shang Hong Liu Fang

2. How much do you know about electricity? • Electricity flows through a wire, doesn’t it? • Can we measure it? • Should we pay for the electricity we used. • Can we see, hear and feel it ? • Can it change into other forms of energy? • 6. Is it dangerous? • 7. Can we put electricity in packets? Yes, It’s a kind of power and flows through a wire. Yes, we can measure it by an electricity meter. Yes, we get a bill for it monthly. No, we can’t Yes, it can change into heat energy, movement energy, light energy and sound energy. Yes, we must be careful with it.

3. A packet of electricity Read paragraph 1-3 carefully, and answer following questions. 1. What did Benny want to buy? He wanted to buy a packet of electricity. trick /i/ v. do sth that is not honest trick sb 2. Why did Benny laugh? He thought he tricked Daisy. 3. Did Benny think Daisy could buy a packet of electricity? fool n. foolish a. stupid look foolish No, he didn’t. 4. What did Benny think of Daisy? He thought Daisy was foolish.

4. Who looked foolish at last? Listen to paragraph 14-21. Tell if the following statements are true or false: 1.( ) At first Benny thought his trick had been successful. 2.( ) Daisy couldn’t buy packets of electricity when she came back. 3.( ) The chemicals inside the batteries produce electricity. 4.( ) Daisy looked foolish at last. T a battery batteries F T F

5. Words and phrases in the text 1. a packet of sweets a packet of electricity 2. look foolish 3.trick trick sb 4.at last 5. in packets 6.polite politely 7. a grin on his face 8. A battery batteries 9. contain 10.produce electricity (make electricity) 11. May I…? Yes, you may. / No, you may not.

6. think about • Is it convenient to carry batteries with us to everywhere? • Do we always use batteries to make electricity? • Where does electricity come from? Power stations

7. How does electricity come into our flats ? Read paragraph 9---13 and rearrange(排序） these sentences (1) It goes into the thin wires which are connected to the meter. (2) Electricity comes from a power station. (3) It goes into the thick wires that are buried under the street. These thick wires are connected to the meter in our flat. (4) It comes into our flats. Choose which one is right: A. (1), (3),(2),(4) B. (4), (2),(3),(1) C. (2),(3),(1),(4)

8. How does electricity come into our flats ? First, electricity comes from a power station. Next, it goes into the thick wires that are buried under the street. These thick wires are connected to the meter in our flat. Thenit goes into the thin wires which are connected to the meter. Finally, it comes into our flats.

9. Choose the right words from the box to name the things in the picture. light bulb meter street cable power station wire wire light bulb meter street power station cable

10. How does electricity come into our flats? First, electricity comes from______________ a power station. Next, it goes into __________________ that are buried _______________. These thick wires cables are connected to __________ in our flat. the thick wires cables Then it goes into ______________ which are connected to the meter. under the street the meter the thin wires our flats. Finally, it comes into___________

11. Can you talk to your deskmate First,…. Next,…. Then…. Finally,…. how electricity comes into our classroom? 5 wire 6 light bulb 4 meter (be connected to) 2 street 1 power station 3cable (that are buried under the…)

12. 1. Do you think it is easy to provide electricity for us? 2. What should we do to electricity? 5 wire Save Electricity 6 light bulb 4 meter (be connected to) 2 street 1 power station 3cable (that are buried under the…)

13. How can we save electricity at home? A: What must we do after taking something out. B:We must close the fridge after taking something out. A:What must we do when we leave a room? B:We must_____________ turn off fans.

14. GROUP WORK How can we save electricity at school? e.g. We must turn off the lights when we leave the classroom. water heater projector

15. How can we save the electricity at school? We must turn off all the lights when we leave the classroom. We must turn off the lights when it is sunny. We must turn off the fans when we leave the classroom. We must turn off the fans when it is not hot. We must switch off the projector after class. We must switch off the class’ computer after using it. We must turn off the water heater when we leave school.

16. Electricity Electricity is a kind of strong power. Electricity flows through w_____ which are c________to power stations . A m____ measures the amount you use and you get a b___ for it m______. It is i_______,but we can change it into forms of e_______that we can see,hear,feel.We can also c______it into energy that can move things. It is very useful. It is our good s______,but if we don’t use it well, it also can be very d_________. So we must be c_____ with it. For example, we mustn’t put metal plates into a microwave oven . We should do our best to s____ electricity. We must s______ off the electrical appliances when we leave school. ires onnected eter ill onthly nvisible nergy hange ervant angerous areful ave witch

17. Assignment 1,Copy and remember new words and phrases. 2,Listen to the text and read it. 3, Writing: Electricity ⑴ What is electricity? ⑵ What is the form of electricity? ⑶ How does electricity come to our flat? ⑷ Is it dangerous? ⑸ Must we save electricity? Thank You

18. 1. connect/k`nekt/v.join together connect ….to… Will you connect this wire ___the television? to be connected to… A:What are wires connected to? B:They are connected to the power station. ( computer, projector, lights……) 2. bury/’beri/v.put sth/someone in the ground be buried e.g. The house was half ______ under snow. berried