课件48张PPT。1Nature and environmentReading (I)Electricity3Cartoon talkWhat do you know about …?Before you readReadCONTENTS PAGECartoon talk2-1I’m a boy. My energy comes from food.12I’m a robot. My energy comes from electricity.2-212What’s in Hi’s hands?
What are Hi and Lo talking about?
Where does Lo’s energy come from?
What’s the weather like in the cartoon?
What will this unit probably be about?A chicken leg and an ice cream.Where their energy comes from.Electricity.It’s rainy.Electricity.What do you know about …?A1 Do you know these things? What can they do?11-112345678910A2 What common points are there among them?They all use electricity.
They change electricity into other forms of energy.11A3 What forms of energy can they changeelectricity into?11-2light energyheat energymoving energysound energy123456789101111-3B We can change electricity into different kindsof energy. Match the kinds of energy in the box with the things in the pictures. Some things may have more than one kind of energy. The first one has been done for you.123456789101111-4heat energy moving energy
light energy sound energy____________
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____________sound energysound energyheat energylight & sound energylight energymoving & sound energymoving energyheat energy1234567891011B You will watch three short clips of video.At the end of each clip, you will see a question. Watch each clip carefully and try to answer the questions. Try to remember every item appeared in the video.11-5123456789101111-6123456789101111-7?123456789101111-81234567891011???11-9123456789101111-101234567891011????11-111234567891011Before you read4-11234A Answer the following questions.What is energy?
How do you feel if you do not have energy?
If you do not have a lot of energy, what can you do to increase your level?
What happens if a machine does not have energy?
How can we supply machines with energy?The power that makes things work.Tired or sleepy.Rest, sleep, eat healthy food and exercise regularly.It doesn’t work.Plug them into an electric socket; use batteries or solar panels.B1 Before you read the story on the next page,look at the title, the first and last two paragraphs and the pictures.1234-241234-34One evening, Daisy said, ‘I’m going to buy a packet of sweets. Does anyone want anything?’
Benny, Daisy’s brother, said, ‘Yes. Can you get me a packet of electricity, please?’Daisy asked, ‘Didn’t you know that, Benny?’
Mum said, ‘Who’s looking foolish now, Benny?’The first two paragraphsThe last two paragraphsB2 Now, try to answer these questions.1234-44What did the girl want to buy?
Who is looking foolish?
Who or what is the servant in the title?(A servant usually means someone who does housework for others.)
Why is the servant in the title dangerous?A packet of sweets.Benny.Electricity.If not used carefully, electricity can hurt us.Read4-112345One evening, Daisy said, ‘I’m going to buy a packet of sweets. Does anyone want anything?’
Benny, Daisy’s brother, said, ‘Yes. Can you get me a packet of electricity, please?’
Daisy said, ‘OK,’ and went out. Benny laughed, ‘Ha! Ha! I’ve tricked Daisy at last. She doesn’t even know what electricity is. She thinks that she can buy it in packets, like sweets! She’ll really look foolish.’Mum said, ‘Do you know what electricity is?’
Benny said, ‘Yes. Electricity flows through a wire. A meter measures the amount you use, and you get a bill for it monthly. It’s like water,in a way.’
‘That’s not a bad explanation,’ said Dad,‘although electricity is much more dangerousthan water. Electricity is a good servant,but a dangerous one. You must alwaysbe careful with it. Can you tell me what itlooks like?’
Benny scratched his head.4-212345Dad said, ‘Nobody’s ever seen electricity. It’s invisible.But we can change it into different forms of energy that we can see, hear or feel. Can you think of an example?’
Benny said, ‘Light! The light in a light bulb.’
Mum said, ‘That’s right. Do you know where electricity comes from?’
Benny said, ‘Well, it comes into our flat through thin wires, and these are connected to thick wires that are buried under the street.’
‘We call the thick wires cables,’ said Dad. ‘What are they connectedto?’
‘A power station,’ said Benny.4-312345Daisy then came back. Benny asked politely, ‘May Ihave my packet of electricity, please?’ There was a grin on his face.
‘Yes, you may,’ said Daisy. ‘Here it is.’
Benny said, ‘But these are batteries!’
Daisy said, ‘That’s right.’
‘But … but …,’ said Benny.
‘Daisy’s right,’ said Dad. ‘They’re packets that contain electricity. The chemicals inside produce electricity.’
Daisy asked, ‘Didn’t you know that, Benny?’
Mum said, ‘Who’s looking foolish now, Benny?’4-41234ConsolidationWorkbook 8B, page 17.
electricity/??lek'tr?s?t?/n.power that can make heat and light, and make things workOur company is a big user of electricity in this area.
Don’t leave the lights on ― it wastes electricity.servant/'s?:v?nt/n.a person who works in another person’s house, doing work like cooking and cleaningFire and water may be good servants, but bad masters.
A politician should be a servant of the people.trick/tr?k/v.do something that is not honest to get what you want from somebodyI’d been tricked and I felt stupid.
He managed to trick his way past the security guards. trick/tr?k/n.a clever plan that make somebody believe something that is not trueThey had to think of a trick to get past the guards.
The kids are always playing tricks on their teacher. foolish/'fu:l?? /adj.stupid; sillyI was foolish enough to believe what Jeff told me.
How could she have been so foolish as to fall in love with him?wire/'wa??(r)/n.a long piece of very thin metalThe rope was not strong enough, so we used wire. meter/'mi:t?(r)/n.a machine that measures or counts somethingA man came to read the gas meter.
The cab driver left the meter running while he waited for us.measure/'me??(r)/v.find the size, weight or amount of somebody or somethingHe’s gone to be measured for a new suit.
A dipstick is used to measure how much oil is left in an engine. bill/b?l/n.a piece of paper that shows how much money you must pay for somethingWe ran up a massive hotel bill.
She always pays her bills on time.monthly/'m?nθl?/adv.that happens or comes every monthShe gets paid monthly.
Some magazines come out monthly.in a waypartlyHowever, in a way, I rather like him.
I agree with him in a way. Some of his ideas are right.explanation/?ekspl?'ne??n /n.telling somebody about something so that they understand it, or giving a reason for something‘I had to see you,’ he said, by way of explanation.
She didn’t give a very adequate explanation for being late. careful/'ke?fl/adj.thinking about what you are doing so that you do not make a mistake or have an accidentHe was careful to keep out of sight.
Be careful not to wake the baby.be careful withtake care of; mindAlways be careful with fire. It can help you as well as hurt you.
You must be careful with all the electrical appliances at home.scratch/skr??/v.move your fingernails across your skinHe scratched the insect bite on his leg with his nails.
The dog scratched itself behind the ear.invisible/?n'v?z?bl/adj.that cannot be seenIt was so cloudy that the top of the mountain was invisible.
When I called, their head was invisible.bulbthe glass part of an electric lamp that gives lightThe light bulb in the kitchen burnt out.
Do you know who the inventor of the electric bulb is?/b?lb/n.connect tolink toWill you connect this wire to the television?
I was again connected to the wrong person.bury/'ber?/v.put something in the ground or under somethingHe was buried in Highgate Cemetery.
The dog buried its bone in the garden.power stationa place where electricity is madeIs it safe to site the power station here?
The new power station has already come into operation. politely/p?'la?tl?/adv.with good manners and respectHe thanked me politely.
You should serve our guests politely.grin/ɡr?n/n.a big smile on the faceShe gave a broad grin.
‘No,’ he said with a grin.contain/k?n'te?n/v.have something inside itPig iron may contain 4% of carbon.
The bottle contains 2,000 millilitres of water.