ElectricityPPT课件
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Electricity ppt.
power to do things. (energy)
VI. Discussion.
The danger of using electricity carelessly at home. It can damage our electrical appliances first, Secondly, it also can cause fires.
We must take use of it properly ,or it can cause the serious result. VII. Homework Write a short passage about saving electricity.
Thank you!
IV. A. Phrases
serve v.服务 servant n. 仆人 ________ electric electrical electricity n. 电_________adj. __________adj. explain v. explanation n. 解释、说明 ________ trick s b.捉弄某人 look like V. 看起来像
Do you often watch TV and use computer at home?
What makes them work, fire, water or electricity?
Electricity.
Can you give some examples about the electrical appliances?
a CD player a cooker an air conditioner
electrical appliances
初一英语Unit6Electricity课件
He will be home at six. 他六点回家。
I won't go out today; I'll stay in and work. 今天我不出去了，我留在家里工作
May表示许可或征求对方的许可,有“可以”的意思
You may go now.你可以走了. May I use your computer?我用一下你的电脑可以吗?
Microwave 微波炉
Do not turn it on when it is empty. Turn it off.Because it might start a fire. 当它空着时，不要打开它（的开关），因为它可能会引起火灾。
turn off 关上 switchoff (switch on, turn on打开)
sweet adj. 甜的; 愉快的，快乐的; 温柔的，亲切的; 芳香的; n. 甜味; 糖果，甜食; 餐后的甜点心; 宝贝 当它解释为糖果的时候是可数名词，如解释为甜品时就是不可数名数，所以要分 情况讨论。 There____a lot of sweets in the box a lot of后面的sweets有S,是复数形式,所以要填ARE 如果是candy,sugar就要 用is了,因为candy,sugar都是不可数名词
Unit Module 3 Natural elements
6
Electricity
electricity, n.电力； 电流，静电
链接：electrical 电的, 有关电的； electric电的, 导电的, 电动的
While I was cooking supper, the electricity went off.
牛津版上海版八年级下册 Unit 3 Electricity works everywhere 教学课件 (共26张PPT)
would be like … .
Without electW riciittyh_loi_guh_t_tin_eg_ledstocritenregtisc_ai_tn_yd_,_bu_i_ldiinntghsein citciietsoi,eu_s,_re_vl_eifr_ey_t_hiniwngocuiwtldoieu/lswdowbueoldiunn’lttdh_e_bd_ea_r__k__a__t .n_ig_h.t.
In the countryside, electrical machines
milk the cows chop their food churn the butter cool the milk
Electricity Works Everywhere
Everyday wonders
Electrical machines
Topic Sentence GOOD TITLE
Supporting Ideas
♪ Where does electricity work in that place? ♪ How does electricity work there? ♪ What would happen without electricity?
in the order of time
in the order of space
How are the supporting ideas organized?
What is your opinion?
TOPIC:
the use of electricity in the school/ at home
it works machines that make all kinds of goods.
Without electW riciittyh_loi_guh_t_tin_eg_ledstocritenregtisc_ai_tn_yd_,_bu_i_ldiinntghsein citciietsoi,eu_s,_re_vl_eifr_ey_t_hiniwngocuiwtldoieu/lswdowbueoldiunn’lttdh_e_bd_ea_r__k__a__t .n_ig_h.t.
In the countryside, electrical machines
milk the cows chop their food churn the butter cool the milk
Electricity Works Everywhere
Everyday wonders
Electrical machines
Topic Sentence GOOD TITLE
Supporting Ideas
♪ Where does electricity work in that place? ♪ How does electricity work there? ♪ What would happen without electricity?
in the order of time
in the order of space
How are the supporting ideas organized?
What is your opinion?
TOPIC:
the use of electricity in the school/ at home
it works machines that make all kinds of goods.
electricityPPT课件
2. 告诉人们必须或禁止做某事用must或mustn’t You must hand in your homework at once. You mustn’t talk loudly in public.
3. 表示请求或允许做某事may 或can May I come in ? Can I open the door ?
4、must have done 也表示肯定的猜测， 意为“ 一定做过……”
They must have cleaned the room . It’s so clean .他们一定打扫过房间了， 它这么干净。
Ⅰ.用适当的情态动词填空：。
1.___C__an_____you swim? 2.We ___c_o_u_ld_n_’_t __operate the machine last week, but we can operate it now. 3.Don’t worry. You _m_a_y__ return me this book tomorrow. 4.He said if he ___c_o_ul_d___ask me another question. 5.My grandma is ill. Youc_a_n_’t__ talk so loudly here . 6.I can’t play with you. I __m_u_s_t_____finish my homework first. 7.I____m_u_s_t___ get up early tomorrow.
4. look like =be like 1. He looks like his father .= He is like his father . 2. ---- What’s he like ?=What does he look like?
3. 表示请求或允许做某事may 或can May I come in ? Can I open the door ?
4、must have done 也表示肯定的猜测， 意为“ 一定做过……”
They must have cleaned the room . It’s so clean .他们一定打扫过房间了， 它这么干净。
Ⅰ.用适当的情态动词填空：。
1.___C__an_____you swim? 2.We ___c_o_u_ld_n_’_t __operate the machine last week, but we can operate it now. 3.Don’t worry. You _m_a_y__ return me this book tomorrow. 4.He said if he ___c_o_ul_d___ask me another question. 5.My grandma is ill. Youc_a_n_’t__ talk so loudly here . 6.I can’t play with you. I __m_u_s_t_____finish my homework first. 7.I____m_u_s_t___ get up early tomorrow.
4. look like =be like 1. He looks like his father .= He is like his father . 2. ---- What’s he like ?=What does he look like?
Unit 6 Electricity words 同步课件(牛津版七年级下)
reply 不及物动词，后面与介词to 连用 answer 及物动词，回答别人的提问。
reply to my question answer my question
foolish
adj.愚蠢的
Why are these people so foolish? I was foolish enough to believe what Jeff told me. fool n.傻瓜 v.愚弄 愚蠢的：foolish; stupid; silly 聪明的：clever; smart; bright; wise
wire
n.电线
have no wires.
The headphones
wired wireless
a. 连线的 a.无线的
connect v.（使）连接
The wires connect under the floor.
connected a.连接的 connection n.连接 be connected to 与...相连
ruler n.尺子
anyone
pron.任何人
Did you see anyone in the room?
anyone “任何人”，只能指人，后面 不 能与of 连用 any one “任何一个”， 既可以指人 也
reply
v.回答
n.回答
The teacher will reply to the question soon. I am waiting for your quick reply.
11.瞬间（名） 12.电池（名） 13.厨具（名） 14.冰箱（名） 15.电灯泡（名） 16.锁（动/名） 17.测试（动/名） 18.使整洁（动） 19.触摸（动） 20.情态的（形）
电荷 ppt课件
1.（多选）关于元电荷的理解，下列说法正确的是（ BD ） A.元电荷实际上是指电子和质子本身 B.电荷量e的数值最早是由美国科学家密立根用实验测得的 C.元电荷是最小的电荷单元，等于1 C D.物体所带的电荷量只能是元电荷的整数倍
2.（多选）一带负电的金属小球放在潮湿的空气中，经过一段时 间后，发现该金属小球上的净电荷几乎不存在了，这说明（CD ） A.金属小球上原来的负电荷消失了 B.此过程中电荷不守恒 C.金属小球上的负电荷减少是由于潮湿的空气将电子导走了 D.该现象是由电子的转移引起的，仍遵守电荷守恒定律
5.(2023·海南藏族自治州中学高二月考)有三个相同的金属小球
A、B、C，其中小球A带有3×10－3 C的正电荷，小球B带有2×10－3 C的 负电荷，小球C不带电。先让小球C与小球A接触后分开，再让小球B与小 球A接触后分开，最后让小球B与小球C接触后分开，试求这时A、B、C 三个小球的带电荷量分别为多少？
不同物质的微观结构不同，由于原子或分子间的相互作用，原子 中电子的多少和运动状况也不相同。例如，金属中原子的外层电 子往往会脱离原子核的束缚而在金属中自由运动，这种电子叫作 自由电子（free electron）。失去自由电子的原子便成为带正电的 离子（ion），它们在金属内部排列起来，每个正离子都在自己的 平衡位置附近振动而不移动，只有自由电子穿梭其中（图 9.1-2）， 这就使金属成为导体。绝缘体中几乎不存在能自由移动的电荷。
3. 使带电的金属球靠近不带电的验电器，验电器的金属箔片张开，如 图所示，表示验电器上感应电荷的分布情况，正确的是（ B ）
A
B
C
D
4.(多选)M和N是两个都不带电的物体 。它们互相摩擦后，M带正电荷 2.72×10－9 C，下列判断正确的有(BCD) A．在摩擦前M和N的内部没有任何电荷 B．N在摩擦后一定带负电荷2.72×10－9 C C．摩擦过程中电子从M转移到N D．M在摩擦过程中失去1.7×1010个电子
2.（多选）一带负电的金属小球放在潮湿的空气中，经过一段时 间后，发现该金属小球上的净电荷几乎不存在了，这说明（CD ） A.金属小球上原来的负电荷消失了 B.此过程中电荷不守恒 C.金属小球上的负电荷减少是由于潮湿的空气将电子导走了 D.该现象是由电子的转移引起的，仍遵守电荷守恒定律
5.(2023·海南藏族自治州中学高二月考)有三个相同的金属小球
A、B、C，其中小球A带有3×10－3 C的正电荷，小球B带有2×10－3 C的 负电荷，小球C不带电。先让小球C与小球A接触后分开，再让小球B与小 球A接触后分开，最后让小球B与小球C接触后分开，试求这时A、B、C 三个小球的带电荷量分别为多少？
不同物质的微观结构不同，由于原子或分子间的相互作用，原子 中电子的多少和运动状况也不相同。例如，金属中原子的外层电 子往往会脱离原子核的束缚而在金属中自由运动，这种电子叫作 自由电子（free electron）。失去自由电子的原子便成为带正电的 离子（ion），它们在金属内部排列起来，每个正离子都在自己的 平衡位置附近振动而不移动，只有自由电子穿梭其中（图 9.1-2）， 这就使金属成为导体。绝缘体中几乎不存在能自由移动的电荷。
3. 使带电的金属球靠近不带电的验电器，验电器的金属箔片张开，如 图所示，表示验电器上感应电荷的分布情况，正确的是（ B ）
A
B
C
D
4.(多选)M和N是两个都不带电的物体 。它们互相摩擦后，M带正电荷 2.72×10－9 C，下列判断正确的有(BCD) A．在摩擦前M和N的内部没有任何电荷 B．N在摩擦后一定带负电荷2.72×10－9 C C．摩擦过程中电子从M转移到N D．M在摩擦过程中失去1.7×1010个电子
班会课件PPT-用电安全教育主题班会
不能直接用水冲浇dian器
dian器设备着火后,不能直接用水冲浇.因为水有导dian性,进入带dian设备后易引触dian,会降低设备绝缘性能,甚至引起设备爆 炸,危及人身安全. 变压器、油断路器等充油设备发生火灾后,可把水喷成雾状灭火.因水雾面积大,水珠强小,易吸热汽化,迅速降低火焰温度.
使用安全得灭火器具
触 dian是dian
高压dian经过空气或其他导dian介质传递dian流通过人体时引起 得组织损伤和功能障碍,重者发生心跳和呼吸骤停.超过1000V
击伤得俗称,通 （伏）得高压dian还可引起灼伤.闪dian损伤（雷击）属于高压
dian损伤范畴.
常是指人体直接
触及dian源或
7
dian器火灾安全扑救方 Extinguishing m式ethods for electrical appliances
dian是个一般术语,是静止或移动得dian荷所产生得物 理现象.在大自然里,dian得机制给出了很多众所熟知得 效应,例如闪dian、摩擦起dian、静dian感应、dian磁 感应等等.
班会课件PPT
5
05
dian气火灾
Electrical fire
dian得简单认 dian得危 生 活 中 得 安 全 用 雷dian防范与危 安全用dian顺口
2021
安全用dian教育教学主题 学校班级会议
安全教育教学
2022-05-01
班会课件PPT
1
01 dian得简单认识
目
02 dian得危害
录
03 生活中得安全用dian
04 雷dian防范与危害
2022-05-01
班会课件PPT
2
dian器设备着火后,不能直接用水冲浇.因为水有导dian性,进入带dian设备后易引触dian,会降低设备绝缘性能,甚至引起设备爆 炸,危及人身安全. 变压器、油断路器等充油设备发生火灾后,可把水喷成雾状灭火.因水雾面积大,水珠强小,易吸热汽化,迅速降低火焰温度.
使用安全得灭火器具
触 dian是dian
高压dian经过空气或其他导dian介质传递dian流通过人体时引起 得组织损伤和功能障碍,重者发生心跳和呼吸骤停.超过1000V
击伤得俗称,通 （伏）得高压dian还可引起灼伤.闪dian损伤（雷击）属于高压
dian损伤范畴.
常是指人体直接
触及dian源或
7
dian器火灾安全扑救方 Extinguishing m式ethods for electrical appliances
dian是个一般术语,是静止或移动得dian荷所产生得物 理现象.在大自然里,dian得机制给出了很多众所熟知得 效应,例如闪dian、摩擦起dian、静dian感应、dian磁 感应等等.
班会课件PPT
5
05
dian气火灾
Electrical fire
dian得简单认 dian得危 生 活 中 得 安 全 用 雷dian防范与危 安全用dian顺口
2021
安全用dian教育教学主题 学校班级会议
安全教育教学
2022-05-01
班会课件PPT
1
01 dian得简单认识
目
02 dian得危害
录
03 生活中得安全用dian
04 雷dian防范与危害
2022-05-01
班会课件PPT
2
Unit 11 Electricity Sta课件2022-2023学年牛津上海版七年级英语下册
*Unit 11 Electricity
Reading: Electricity around us
Where does our electricity come from?
wire n. 电线；导线
ire n. 尖顶
electricity n. 电；电能 pylon n. 电缆塔 carry v. 支撑；承载
Boil some water, make some steam. It can drive a big machine. It makes electricity. (5) What carries the wires to our homes? The pylons. (6) Where does electricity to go in our homes?
2. Electricity! 电！ electricity〔不可数名词〕电；电能 Don’t waste electricity. 别浪费电。 【拓展】①electric〔形容词〕电的；用电的；发电的 an electric light电灯 ②electrical〔形容词〕电的；与电有关的 electrical power/energy 电力/能
When Benjamin Franklin flew a kite, Something in the wire gave him a fright. What could it be? Electricity!
But we cannot use the lightning. Doing that would be too frightening. What do we need? Electricity!
arm n. 胳膊→arm n. 臂状物 plug n. （电源）插座；插头
Reading: Electricity around us
Where does our electricity come from?
wire n. 电线；导线
ire n. 尖顶
electricity n. 电；电能 pylon n. 电缆塔 carry v. 支撑；承载
Boil some water, make some steam. It can drive a big machine. It makes electricity. (5) What carries the wires to our homes? The pylons. (6) Where does electricity to go in our homes?
2. Electricity! 电！ electricity〔不可数名词〕电；电能 Don’t waste electricity. 别浪费电。 【拓展】①electric〔形容词〕电的；用电的；发电的 an electric light电灯 ②electrical〔形容词〕电的；与电有关的 electrical power/energy 电力/能
When Benjamin Franklin flew a kite, Something in the wire gave him a fright. What could it be? Electricity!
But we cannot use the lightning. Doing that would be too frightening. What do we need? Electricity!
arm n. 胳膊→arm n. 臂状物 plug n. （电源）插座；插头
Unit6Electricity第3课时Grammar课件牛津深圳版七年级英语下册
difference electric leave wash they
be real drive tooth little How did we help to save our Earth this week？ Let me tell you. First， my family tried to save 1. electricity . We never left the
B. must
C. should
D. need
（ C ）6. （2022·北京）—
I take photos here？
— Sorry， you can’t. It’s not allowed in the museum.
A. Must
B. Need
C. Can
D. Will
一
二
三
四
五
六
（ B ）7. — Listen！ I think it
一
二
三
四
五
六
四、 句型转换。
1. We can use electricity to do many things.（改为否定句）
We can’t use electricity to do many things.
2. You must do that， Benny.（改为否定句）
You needn’t do that， Benny.
A. can
B. may
C. won’t
D. mustn’t
（ C ）2. — Must I stay here with you， Mum？
— No， you
. You may go home now， but you
chapter7-electricity-2017
The electrical energy in a lightning bolt ionizes atoms in the atmosphere and produces great amounts of heat, warming the surrounding air.
Thunder Sound is due to air being heated and expanding rapidly. Effects of Lightning 1. Power Outages 2. Injury or Loss of Life 3. Fires
The
charge on the neutral object is the same as the charge of the object with which it is in contact. The negatively charged object have a smaller negative charge.
INDUCTION Is the process of charging an object by grounding it while it is near another charged object. When an object is charged by induction, its charge is opposite to that of the charging object.
Rubbing rubber with fur Rubber will gain electrons and fur will lose electrons. Thus Furpositively charged Rubbernegatively charged
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来自ab acc
c
contain
politely in a way
flows
Words and expressions in Reading B :
1. trick: v/n 戏弄,欺骗 It’s wrong to trick others.=It’s wrong to fool others =It’s wrong to play tricks (a trick) on others.= It’s wrong to play jokes (a joke) on others
2. at last = in the end =finally I finished my work at last . I finished my work in the end . I finished my work finally . 3. flow through Elctricity flows through a wire .It’s like water ,in a way .
change v/n. 变化 We can’t see electricity , but we can change it into energy . Great changes have taken place in Shenzhen since 1980. changeable a. The weather is changeable on top of the mountain . n. 找头；（找回的）零钱 Here is your change.
Unit 4 Electricity
Words and expressions in Reading A
What do you know about:
electricity n. 电 electrician n. 电工 There is a problem with the electricity in Tom’s flat . An electrician has come to deal with it . electric a. 电的 electric storm electric shock electrical a. 电气科学的 electrical apparatus 电器 electrical engineer
你把这根电线和电视机连上好吗？
2 . 接通电话 Connect me with Beijing University.
给我接北京大学。
9 bury v. buried buried When people died , they are usually buried . 10. cable n. 电缆 wire: n. 电线 Computers are connected with each other by means of cables.
4. look like =be like 1. He looks like his father .= He is like his father . 2. ---- What’s he like ?=What does he look like? ---- He is short and fat . 5. in a way (partly)在某种程度上, 稍稍 In a way , I agree with him . Some of his ideas are right by the way By the way , can you tell me when we will leave ? in the way The table is in the way .Please move it . on the way On the way to school , I saw Ken . in this way I have collected many stamps in this way .
11. contain v. 包含；容纳；装有 Beer contains alcohol. 啤酒含有酒精。 The envelop contains some photos of her family.
energy n. Young people usually have more energy than the old.
年轻人通常比老年人有活力。
energetic
a.
1. He is an energetic boy; he enjoys sports.
2."The more the young students worked, the more energetic they became." 这些年青学生们越干越有劲。
6. explain v. explanation n. Can you explain it to me ? = Can you give an explanation about it to me ?
7. form v. 组成 ＆ n. 形式 1.Mike formed a football team in his class with his classmates last term . 2. We can change it into different forms of energy. 3. She has a tall graceful form. 她有着高大优雅的外形。
8 be connected to 1. The wires in our flat are connected to cables buried under the street . 2. Hong Kong and Shenzhen are connected by Luohu Bridge . connect v. 1. （常与to, with连用）连接；结合；连结 Will you connect this wire to the television?
c
contain
politely in a way
flows
Words and expressions in Reading B :
1. trick: v/n 戏弄,欺骗 It’s wrong to trick others.=It’s wrong to fool others =It’s wrong to play tricks (a trick) on others.= It’s wrong to play jokes (a joke) on others
2. at last = in the end =finally I finished my work at last . I finished my work in the end . I finished my work finally . 3. flow through Elctricity flows through a wire .It’s like water ,in a way .
change v/n. 变化 We can’t see electricity , but we can change it into energy . Great changes have taken place in Shenzhen since 1980. changeable a. The weather is changeable on top of the mountain . n. 找头；（找回的）零钱 Here is your change.
Unit 4 Electricity
Words and expressions in Reading A
What do you know about:
electricity n. 电 electrician n. 电工 There is a problem with the electricity in Tom’s flat . An electrician has come to deal with it . electric a. 电的 electric storm electric shock electrical a. 电气科学的 electrical apparatus 电器 electrical engineer
你把这根电线和电视机连上好吗？
2 . 接通电话 Connect me with Beijing University.
给我接北京大学。
9 bury v. buried buried When people died , they are usually buried . 10. cable n. 电缆 wire: n. 电线 Computers are connected with each other by means of cables.
4. look like =be like 1. He looks like his father .= He is like his father . 2. ---- What’s he like ?=What does he look like? ---- He is short and fat . 5. in a way (partly)在某种程度上, 稍稍 In a way , I agree with him . Some of his ideas are right by the way By the way , can you tell me when we will leave ? in the way The table is in the way .Please move it . on the way On the way to school , I saw Ken . in this way I have collected many stamps in this way .
11. contain v. 包含；容纳；装有 Beer contains alcohol. 啤酒含有酒精。 The envelop contains some photos of her family.
energy n. Young people usually have more energy than the old.
年轻人通常比老年人有活力。
energetic
a.
1. He is an energetic boy; he enjoys sports.
2."The more the young students worked, the more energetic they became." 这些年青学生们越干越有劲。
6. explain v. explanation n. Can you explain it to me ? = Can you give an explanation about it to me ?
7. form v. 组成 ＆ n. 形式 1.Mike formed a football team in his class with his classmates last term . 2. We can change it into different forms of energy. 3. She has a tall graceful form. 她有着高大优雅的外形。
8 be connected to 1. The wires in our flat are connected to cables buried under the street . 2. Hong Kong and Shenzhen are connected by Luohu Bridge . connect v. 1. （常与to, with连用）连接；结合；连结 Will you connect this wire to the television?