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Chapter 5Electricity
A Dangerous Servant
Oxford English Grade SevenTeacher: kathy Ma 东湖中学 马静
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?
Natural elements
firewind
water light
Natural element
electricityelectricity
How can we get electricity?
lightning
power station
Different kinds of power station
Riddles
a computer
a fan
a light
an air-conditioner
a fridge
a TV
a computer
a fan
a light
an air-conditioner
a fridge
a TV
Electrical machines
How do electrical machines get electricity?
plug socket
put the plug on the socket
recorderssound energy
What kind of energy can they produce?
Recorders can produce sound energy.
ironsheat energy
Recorders can produce sound energy.
Irons can produce heat energy.
What kind of energy can they produce?
lights
What kind of energy can they produce?
Recorders can produce sound energy.
Irons can produce heat energy.
light energyLights can produce light energy.
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.
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
ListeningListening
Listen carefully and Listen carefully and choose the right choose the right
answer.answer.
We mustn’t
touch the plug with the wet handWe mustn’t touch the plug with the wet hand.
We mustn’t
tubheater
have a bath
put the heater near the tubWe mustn’t put the heater near the tub.
We mustn’t
play with the electricityWe mustn’t play with the
electricity.
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
Save ElectricitySave Electricity
Homework:Make a Poster
How to Save Electricity
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