1　声音是怎样产生的教学目标

《声音的产生》双语科学课教案

执教人：石依倩

课题

Title

声音的产生

The Production of Sound

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学科目标：

1、能用扩散性思维设计出各种制造声音的方法。

2、通过观察物体发声时的状态，概括出声音是由物体振动产生的。

3、知道摩擦、弹拨、敲击可以使物体振动而发出声音。

4、在实验中积极思考、及时记录，培养学生的合作意识。

教学目标

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语言目标：

Teaching Aims

1、听懂、会说的词和词组：vibrate（振动）；make sound（制造声音）。

2、了解的词：production（产生）；tuning fork（音叉）；drum（鼓）。

3、学会运用句式“I can hear the sound of ……”。

4、听懂教师的课堂用语，如“Please make sound with your ruler（用尺子制造声音）”等。

教学重难点

在观察、比较、讨论中认识声音是由振动产生的。

Teaching Focus 教学准备

1、演示实验：6个烧杯、小军鼓、红豆

Preparation 2、小组实验：实验记录表、音叉、水杯、直尺

（一）导入

T：Do you know what is piano? S:钢琴。

T:Teacher wants to show you a special piano.It is made of water.(展示水钢琴)Do you know how to play it? 学生上台敲击水钢琴。

T:Nice music! Teacher wants to play it for you, too. (敲击歌曲《小星星》)It is beautiful,right? Today we will learn something about sound “The Production of Sound”. 教学过程

Teaching （二）听声音，说一说Listen and Speak Procedure T:First of all,teacher has some music.Please listen carefully and think what can you hear. (播放第一段雨声的音频) T:What can you hear? I can hear the sound of ……(板贴句式) S:I can hear the sound of rain. (播放第二段鸟叫声的音频) S:I can hear the sound of bird. T:Actually animal can make special sound. For example, miao miao,what can you hear? S:I can hear the sound of cat.

T:Good job!请同桌两人为一组，仿照老师刚刚的对话，说一说。

学生练习、展示。

（三）活动1：用身体制造声音Activity 1: make sound with your body T:Actually, we were making sound with our body.（板贴目标词组）

Except for speaking, how can we make sound with our body? S:(肢体动作)走路。

T:Walking can make sound. S:(肢体动作)拍手。

T:Clapping hands can make sound. T:There are many ways to make sound with our body. What about other things?

（四）活动2：用尺子制造声音Activity 2: make sound with the ruler T:Everyone has a ruler. Try to make sound with the ruler in different ways.Two students as a group, each group has an experiment form.Please write down your ways. 学生活动，用尺子制造声音并填写实验记录表。

两到三组学生交流展示。

T:Knock,rub or flick the ruler.We can make sound successfully.Why can you make sound? What happened to the ruler? S:尺子发出声音的时候都在振动。 T:We can use the word “vibrate”.Follow me “vibrate”. S:Vibrate. T:Please flick your ruler and see whether it is vibrating. 学生弹尺子再次观察是否尺子振动。

T：Can you see the vibration? S:Yes! T:But the vibration is so fast.Do you want to see the vibration more clearly? S:Yes!

（五）活动3：眼见为实，手摸为真Activity 3: see the vibration & touch the vibration

T:We can see the vibration and touch the vibration. Use the turning fork to help us.两人一组，用小锤子敲击音叉的侧面，快速插入水中，仔细观察，你会看到什么现象。再敲击音叉，用手摸一摸振动，体会有什么感觉。

学生活动。

T:When you put the turning fork in the water, what can you see? S:看到水花四溅。

T:为什么会水花四溅？

S:因为音叉振动使水花四溅。

T:Excellent.When you touch the turning fork,what can you feel?

S:有麻麻的感觉。

S:感觉手指也在跟着振动。

T:通过实验，同学们知道声音是如何产生的吗？

S:声音是通过振动产生的。

（六）课堂小结Test T:Teacher has three pictures,please find out what is vibrating in the picture. (Picture 1:speak) S:声带在振动。

(Picture 2:play the violin) S:琴弦在振动。

(Picture 3:play the ocarina) S:空气在振动。

T:Well done.The next test is about the drum.First,how to make sound with the drum? 学生上台敲击军鼓发出声音。

T:Second,how to see the vibration? 学生利用身边的纸团、橡皮屑等放在鼓面，观察振动。

T:The last one,how to cut off the sound?如何立刻停止声音？

学生用手按住鼓面，停止振动也就停止声音。

T:同学们成功地通过了老师的测试，通过这堂课的学习你知道了哪些知识？

师生共同小结：我们可以通过不同的方法发出声音，声音是通过振动产生的。停止振动的同时声音也停止。