资源简介

(共26张PPT)
沪教版 四年级
下
Unit 7 How do things change？
Period 4 Extend
Core competences
1.学生能够认读、理解并正确说出词汇solid, liquid, gas, ice, water, air, steam, freeze, melt, boil；掌握描述物质状态及状态变化的核心句型“The... is a... It’s changing into a...”，能够用英语简单描述物质的三种形态及水的形态变化过程。
2. 学生能够读懂语篇内容，理解物质三态的基本概念及水的状态转换过程；能够在情境中运用所学词汇和句型，口头描述生活中物质的形态及变化；能够通过观察图片和情境，完成语篇相关的问答和信息匹配任务，提升阅读和表达能力。
3学生能够对生活中的科学现象产生兴趣，乐于用英语表达自己的观察和发现；初步建立物质三态的科学认知，理解事物是不断变化的，培养观察能力和探究意识；在小组活动中积极参与交流，提升合作意识和表达自信。
1
Lead in
导入环节
3
Practice
知识操练
5
Summary
课堂总结
2
Presentation
新知讲解
4
Production
输出运用
6
Homework
作业设计
01
Lead in
Think and say
Look at these thing.What are they Can you put into three groups？Why？
02
Presentation
Pre-reading
We can put them into three groups: solids, liquids and gases. Today we will read a passage about them.
02
Presentation
Pre-reading
Task1:Look and answer .
1. What are the three groups we talked about just now
2.Can you touch a gas？Why or why not？
3.What is the passage about
We talked about solids, liquids and gases.
It’s about what our world is made of. / It’s about solids, liquids and gases.
solid “固体”
liqui “液体”
gas “气体”
No，we can’t.Because gas is usually light and we can’t see it.
02
Presentation
While-reading
Listen and answer.
Everything in our world is a solid, liquid or gas.
Ice and metal are solids.
Water and milk are liquids.
Air and steam are gases.But things change.
02
Presentation
While-reading：Skimming
1.What is the main idea of the passage
2. What are the three states of matter mentioned in the text
The passage tells us everything in our world is a solid, liquid or gas, and they can change.
They are solids, liquids and gases.
02
Presentation
While-reading：Skimming
1.What happens when water freezes
The water is a liquid. When it’s freezing, it’s changing into a solid.
The water is a liquid.
Now it’s freezing.
It’s changing into a solid.
02
Presentation
While-reading：Skimming
1.What happens when ice melts
The ice is a solid. When it’s melting, it’s changing into a liquid.
The water is a liquid.
Now it’s freezing.
It’s changing into a solid.
02
Presentation
While-reading：Skimming
1.What happens when water boils
The water is a liquid. When it’s boiling, it’s changing into a gas.
The water is a liquid.
Now it’s boiling.
It’s changing into a gas.
02
Presentation
While-reading：Look and review.
State Things
Solid
Liquid
Gas
ice
metal
water
milk
air
steam
... and ... are ...
(solids/liquids/gases)
02
Presentation
Listen and repeat
02
Presentation
Listen and repeat
The ice is a solid.
Now it’s melting.
It’s changing into a liquid.
The water is a liquid.
Now it’s freezing.
It’s changing into a solid.
Everything in our world is a solid, liquid or gas.Ice and metal are solids.
Water and milk are liquids.Air and steam are gases.But things change.
The water is a liquid.
Now it’s boiling. It’s changing into a gas.
What is our world made of
02
Presentation
Read all together
The ice is a solid.
Now it’s melting.
It’s changing into a liquid.
The water is a liquid.
Now it’s freezing.
It’s changing into a solid.
Everything in our world is a solid, liquid or gas.Ice and metal are solids.
Water and milk are liquids.Air and steam are gases.But things change.
The water is a liquid.
Now it’s boiling. It’s changing into a gas.
What is our world made of
02
Presentation
Read all together
每个小组选择自己喜欢的方式朗读。
Read by yourself
自读
Read after one
一人领读
Read one by one
一人一句读
Read together
一起齐读
02
Presentation
Post-reading
When does water change into gas
When does it change into a solid
Where can we see this in our daily life
03
Practice
Sharp eyes.
melting
change into
liquid
freezing
boiling
03
Practice
Sharp eyes.
made of
gas
steam
metal
everything
03
Practice
Cause Effect
1. The water boils. a. It changes into .
2. The water freezes. b. It changes into ________.
3. The ice melts. c. It changes into ________.
a gas
a solid
a liquid
melt
Think and fill.
03
Practice
Share and say.
Water can change.
It changes into ... when ...
Cause Effect
1. Water boils. a. It changes into .
2. Water freezes. b. It changes into ________.
3. Ice melts. c. It changes into ________.
a gas
a solid
a liquid
melt
04
Production
Think and discuss.
What things around us can change
How do they change
When chocolate melts,
it changes into a liquid.
When we put the fruit juice
in the freezer, it turns into a lolly.
…
When we mix the sugar and cream, it becomes a mixture.
05
Summary
Phrases
Sentences
solid, liquid, gas, ice, water, air, steam, freeze, melt, boil
The... is a... It’s changing into a...
What have we learned from this class
What is our worl made of？
06
Homework
1. Read the text
on P70.
1
3. Show your dialogue
to the class next time!
3
2. Make a “matter changes”dialogue poster with your partner.
2
4.Finish the exercises and the survey.
4
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