chapter 5 electricity a dangerous servant oxford english grade seven teacher: kathy ma 东湖中学...
TRANSCRIPT
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Chapter 5Electricity
A Dangerous Servant
Oxford English Grade SevenTeacher: kathy Ma 东湖中学 马静
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Let’s watch a flash together!
• Questions:• Q1:What does the flash tell us?
• Q2:Water is a natural element. What other natural element can you think of?
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Natural elements
firewind
water light
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Natural element
electricityelectricity
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How can we get electricity?
lightning
power station
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Different kinds of power station
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Riddles
a computer
a fan
a light
an air-conditioner
a fridge
a TV
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a computer
a fan
a light
an air-conditioner
a fridge
a TV
Electrical machines
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How do electrical machines get electricity?
plug socket
put the plug on the socket
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recorderssound energy
What kind of energy can they produce?
Recorders can produce sound energy.
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ironsheat energy
Recorders can produce sound energy.
Irons can produce heat energy.
What kind of energy can they produce?
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lights
What kind of energy can they produce?
Recorders can produce sound energy.
Irons can produce heat energy.
light energyLights can produce light energy.
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fans
Recorders can produce sound energy.
Irons can produce heat energy.
Lights can produce light energy.
movement energy
What kind of energy can they produce?
Fans can produce movement energy.
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A: What kind of energy can … produce?B: … can produce ____ energy.
fan
printer air-conditioner MP3 kettle
computer
heater
MP4fridge
MD
video player
washing machine recordermobile phonewalkman
radio
light
CD player
vacuum cleaner
video player
bulb
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ListeningListening
Listen carefully and Listen carefully and choose the right choose the right
answer.answer.
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We mustn’t
touch the plug with the wet handWe mustn’t touch the plug with the wet hand.
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We mustn’t
tubheater
have a bath
put the heater near the tubWe mustn’t put the heater near the tub.
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We mustn’t
play with the electricityWe mustn’t play with the
electricity.
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Safety First
wet handsA: Can I …
B: No. You mustn’t …
water heater
near the tub
heater
touch the plug
play with electricity
change the bulb
open the window
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Save ElectricitySave Electricity
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Homework:Make a Poster
How to Save Electricity