资源简介

(共20张PPT)
Listening
Key question
主题范畴：人与自然
What do you know about electricity
Unit 6 Electricity everywhere
What do you know about electricity
Do you know any interesting facts about electricity
Lead in
1. How much do you know about electricity Discuss the questions in pairs.
(1) Is electricity an invention or a discovery
(2) How fast does electricity travel
(3) Is the electric car a new idea When was it first
invented
Background information
电作为自然现象确实是被发现的。比如古希腊人摩擦琥珀产生静电，还有本杰明·富兰克林的风筝实验，这些都说明电是自然界存在的现象，所以属于发现。
伏打发明了电池，法拉第发明了发电机，爱迪生和特斯拉分别发展了直流电和交流电系统，这些都是人类创造的技术，所以属于发明。电力的应用推动了第二次工业革命，这显然涉及到技术上的创新和应用，属于发明的范畴。
Pre-listening
against
speed
rub
fur
electric car
at the speed of
per second
prep. 紧靠；碰；撞
n. 速度；速率
v. 擦；磨；搓
n. （动物的）软毛
电动汽车
以……的速度
每秒
New words
Listening tips
1. Pre-listening prediction strategies.
听前预测策略。
2. Legitimate inference.
合理推断。
Listening tips:
Read the sentences before listening.
Underline the words you hear.
Pay attention to any new words you hear.
√
√
√
Listening
Listening tips:
Write down the important information.
Pay attention to words like “first of all”, “another”, and “finally”.
smooth stone
light
the first electric car
the second half of the 19th century
billions of pounds
offices
Good evening. Thanks for joining me in this week’s The Natural World. I’m Rebecca. Tonight, I’ll share some interesting facts about electricity with you.
First of all, as you may already know, electricity was not invented. It was discovered. But do you know when it was first discovered Many believe that electricity was first discovered by the Ancient Greeks more than 2,500 years ago. They produced electricity by rubbing fur against smooth stone!
Next, do you know how fast electricity travels The answer is: the speed of light! That is, about 300 million metres per second!
Another interesting fact is about electric cars. They are very popular now, but the idea is not new.
Tapescript
British inventor Robert Anderson invented the first electric car around 1832. However, this car was not very useful. It wasn’t possible to drive electric cars until the second half of the 19th century.
Finally, we are always trying our best to make good use of this energy, but according to a report, billions of pounds of electricity is wasted every single year in the UK. And another report shows that in the USA, about 30% of the electricity used in offices each year is wasted. This just shows how important it is to save electricity in our daily lives.
That’s all from me today. I hope you enjoyed learning a bit more about electricity.
Ask and answer
Example:
Student A: How did the ancient Greeks produce electricity
Student B: By rubbing fur against smooth stone.
Work in pairs. One student makes up Wh-questions, and the other one answers them according to the text.
Post-listening
More Exercise
More than 2,500 years ago.
Robert Anderson.
By giving examples.
How fast does electricity travel
Is there an electric car in your family
at the speed of
It was impossible to
Billions of
make good use of
try our best
Group discussion
Discuss the following questions in your group. One of the group members should then share your ideas with the class.
What other interesting facts about electricity do you know
Billions of pounds of electricity is wasted every single year in the UK.
Pay attention to the numbers in the text. How do you feel What should you do
In the USA, about 30% of the electricity used in offices each year is wasted.
Save
electricity
!
When we use electricity, we should use it safely.
We should try to save electricity.
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