(共22张PPT)
Unit4 What’s the weather like
Lesson16
北京版小学英语六年级下册
Teaching Goals
1.学生通过阅读本课有关 rainbow 的语段，能够认读、理解下列单词和短语：rainbow，be made of, sunlight, water, touch, colour, scatter, world, bounce,absorb,is made up from,go away,darkness, different，indigo，violet，并且能够简单运用这些词汇来描述rainbow的组成成分和形成的过程。
2.学生通过阅读本课有关 rainbow 的语段，能够独立或者与好友合作通过书上提供的Water glass method，Miror method和CD method三种方法，尝试着制作出漂亮的彩虹，制作成功后要邀请他人一起欣赏，分享成功的快乐。学生能够把制作彩虹的体会简单用英语记录下来，不断积累写作素材，为很好地提高写作能力做准备。
3.学生通过阅读rainbow语段，能够正确理解和朗读短文内容，能够思考其他制作彩虹的方法。
4.学生能够初步掌握在短文中画找信息和新知的阅读方法
。
5.学生能够利用关键词、关键句对本课内容进行复述。
6.学生通过电子邮件能够用英语向朋友描述彩虹的形成以及如何制作彩虹，加强同学间的沟通与交流。
Word Bank
rainbow 彩虹
be made of 由……组成
sunlight 阳光
water 水
touch 触摸
colour 颜色
scatter 散开
world 世界
bounce 弹起；反弹
absorb 吸收
is made up from 由……制成
go away 走开；离去
darkness 黑暗
different 不同的
indigo 靛蓝色
violet 紫罗兰色的
Pre-reading
PART 01
Rainbow song
How many colours does a rainbow have
What are they
Seven colours: red, orange, yellow, green, blue, indigo, voilet.
ingido 靛蓝色
violet 紫罗兰色
While-reading
PART 02
Rainbows are made of sunlight and water. Before and after it rains, there is a lot of water in the air. When sunlight touches the drop of water，the light scatters（散开）and we see all the colours of the rainbow.
Can you read
Rainbow
What is rainbow made of
Rainbows are made of sunlight and water.
Before and after it rains, is there a lot of water in the air
Yes, there is.
When sunlight touches the drop of water，what happens then
The light scatters and we see all the colours of the rainbow.
Can you read
Light from the sun colours our world. Light can bounce（反射），scatter（散 开）， or be absorbed（被 吸 收）.Light is made up from the colours of the rainbow. We see sunlight as white, so when light bounces, it comes back to us the same colour—white. When light is absorbed, it goes away and we see darkness. We see many different colours when light is scattered.
The colours of sunlight are: red, orange, yellow, green, blue, indigo, and violet.
We can make a rainbow with water and sunlight.
Can you read
Rainbow
Light from the sun colours our world.
Can you read
Light can bounce（反射），scatter（散 开）， or be absorbed（被 吸 收）
Can you read
bounce
We see sunlight as white, so when light bounces, it comes back to us the same colour—white.
Light can bounce（反射），scatter（散 开）， or be absorbed（被 吸 收）
Can you read
scatter
We see many different colours when light is scattered.
Light can bounce（反射），scatter（散 开）， or be absorbed（被 吸 收）
Can you read
absorb
When light is absorbed, it goes away and we see darkness.
What colour is the sunlight
Can you read
red
orange
yellow
green
blue
indigo
violet
Can you read
Rainbow
Water glass method
1.Place a glass of water on a table in front of a sunny window.
2.Put a piece and white paper on the floor below the glass.
3.Move the glass or the paper until you can see the rainbow on the paper.
1
2
3
Can you read
Rainbow
Mirror method
1.Place a mirror inside a full
glass of water.
2.Make sure the room is dark,
and has white walls.
3. Shine a flashlight into the glass, moving the light around until a rainbow can be seen.
1
2
3
Can you read
Rainbow
CD method
1. Take a CD. Clean it.
2.Place the CD on a table,under the sunlight.
3. Look at the CD, and you will see the rainbow.
1
2
3
Task 2
Answer the following questions.
We need a mirror, a full glass of water, a dark room.
We need a clean CD, a table and sunlight.
Red, orange, yellow, green, blue, indigo and violet.
Rainbows are made of sunlight and water. Before and after it rains, there is a lot of water in the air. When sunlight touches the drop of water，the light scatters（散开）and we see all the colours of the rainbow.
Light from the sun colours our world. Light can bounce（反射），scatter（散 开）， or be absorbed（被 吸 收）.Light is made up from the colours of the rainbow. We see sunlight as white, so when light bounces, it comes back to us the same colour—white. When light is absorbed, it goes away and we see darkness. We see many different colours when light is scattered.
The colours of sunlight are: red, orange, yellow, green, blue, indigo, and violet.
We can make a rainbow with water and sunlight.
Can you read
Water glass method
1.Place a glass of water on a table in front of a sunny window.
2.Put a piece and white paper on the floor below the glass.
3.Move the glass or the paper until you can see the rainbow on the paper.
Mirror method
1.Place a mirror inside a full
glass of water.
2.Make sure the room is dark,
and has white walls.
3. Shine a flashlight into the glass, moving the light around until a rainbow can be seen.
CD method
1. Take a CD. Clean it.
2.Place the CD on a table,under the sunlight.
3. Look at the CD, and you will see the rainbow.
Post-reading
PART 03
How a rain is formed
