資源簡介

(共14張PPT)
Unit 6 Electricity everywhere
主題范疇：
人與自然；人與社會
主題群：
環境保護；科學與技術
子主題：
環境污染及原因，環保意識和行為；科學技術與工程，人類發明與創造
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 單元目標
I can:
New words
against prep. 緊靠；碰；撞
speed n. 速度；速率
electric car 電動汽車
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
電鰻：這類生物能產生高達600伏甚至更強的強大電擊。它們利用這種電來捕獵、自衛和交流。電鰻腹部有三對產生電的器官：主器官、亨特氏器官和薩克斯氏器官。這些器官由電細胞構成，電細胞是專門用于儲存和釋放電能的特殊細胞。
本杰明 富蘭克林與風箏實驗：1752年，本杰明 富蘭克林在雷雨中進行了著名的風箏實驗。
他放飛系有金屬鑰匙的風箏，證明了閃電是電的一種形式。這一實驗促成了避雷針的發明，幫助保護建筑物免受雷擊。
首個電池：1800 年，亞歷山德羅 伏特發明了首個電化學電池。他將鋅片和銅片交替堆疊，中間用鹽水浸泡過的布或硬紙板隔開，創造出了一種能產生持續電流的裝置，這便是現代電池的前身。
鴨嘴獸：鴨嘴獸是一種獨特的哺乳動物，其喙部有能探測獵物在水中肌肉運動產生的電信號的電感受器。這種能力使鴨嘴獸能在能見度低的渾水中捕獵。
Thank you!

展開更多......

收起↑