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(共14张PPT)
Unit 6 Electricity everywhere
主题范畴：
人与自然；人与社会
主题群：
环境保护；科学与技术
子主题：
环境污染及原因，环保意识和行为；科学技术与工程，人类发明与创造
Key question
What role does electricity play in our daily lives
understand why electricity is important.
explain different ways of producing electricity.
observe safety rules for using electricity.
talk about how to save electricity.
Unit objectives 单元目标
I can:
New words
against prep. 紧靠；碰；撞
speed n. 速度；速率
electric car 电动汽车
Lead in
Do you know how these cars work
They use electricity.
Pre-listening
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
While-listening
Interesting facts about electricity
(1) Who first discovered electricity
(2) How we produce electricity today
(3) How electricity travels to our home
(4) When the first electric car was invented
(5) How much electricity is wasted each year in
the UK and the USA
Listen to a podcast about electricity and tick ( ) the topics mentioned in it.



Listen again and complete the notes.
smooth stone
light
the first electric car
the second half of the 19th century
billions of pounds
offices
Tapescript
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 2500 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 meters per second. Another interesting fact is about electric cars. They are very popular now, but the idea is not new.
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.
What other interesting facts about electricity do you know
电鳗：这类生物能产生高达600伏甚至更强的强大电击。它们利用这种电来捕猎、自卫和交流。电鳗腹部有三对产生电的器官：主器官、亨特氏器官和萨克斯氏器官。这些器官由电细胞构成，电细胞是专门用于储存和释放电能的特殊细胞。
本杰明 富兰克林与风筝实验：1752年，本杰明 富兰克林在雷雨中进行了著名的风筝实验。
他放飞系有金属钥匙的风筝，证明了闪电是电的一种形式。这一实验促成了避雷针的发明，帮助保护建筑物免受雷击。
首个电池：1800 年，亚历山德罗 伏特发明了首个电化学电池。他将锌片和铜片交替堆叠，中间用盐水浸泡过的布或硬纸板隔开，创造出了一种能产生持续电流的装置，这便是现代电池的前身。
鸭嘴兽：鸭嘴兽是一种独特的哺乳动物，其喙部有能探测猎物在水中肌肉运动产生的电信号的电感受器。这种能力使鸭嘴兽能在能见度低的浑水中捕猎。
Thank you!

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