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