外研版（2019）必修第三册 Unit 3 The World of Science Writing 课件(共24张PPT)

(共24张PPT)
The world of science
B3M3
B3M3
Writing
Read the instructions for the experiment and answer the questions.
1. What do you think the results of this experiment will be
2. What can you learn from this experiment
Pre-writing: Read & Answer
1.What do you think the results of this experiment will be
The egg will squeeze into the bottle.
2. What can you learn from this experiment
The experiment shows us the effects of air pressure.
Air pressure indeed exists, and it is very powerful.
Pre-writing: Read & Answer
Complete the boxes with the information in Activity 5. Do further research if necessary.
While-writing
The experiment is designed to ____________________
____________________.
prove whether air
pressure really exists
While-writing
I prepared ____________________________________ _______________________________________ to do this experiment.
Procedure:
____________________________________________________________________________________________________________________________________________________________________________________
____________________________________________.
a boiled egg, a glass bottle whose neck is a bit smaller than the egg, and some hot water
First, I removed the shell of the egg. Then, I carefully poured some hot water into the bottle, and shook the bottle gently. After a few minutes, I poured out the hot water. Just at the same time, I quickly placed the egg on top of the bottle
While-writing
After the experiment, I can draw the conclusion that ______________________________________________
_____________________________________________.
air pressure indeed exists, and it is very powerful. It is the force of the air that pushed the egg into the bottle
The structure of an experiment.
While-writing
An experiment report usually consists of three parts.
Introduction: Introduce the aim of the experiment.
Main body: Describe the materials used in the experiment and explain the procedures.
Conclusion: Report the results and what you have learnt.
Post-writing
Write a report of the experiment and share your report with the class.
Post-writing
Useful expressions:
The experiment is designed / aimed to...
I prepared..., including...
First..., then..., after...
After the experiment, I can draw a conclusion that...
Write a report of the experiment and share your report with the class.
Post-writing
Post-writing: Evaluation
Questions Your evaluation Evaluator
Does the report include the key points 4 2 0
Is the report organized according to the layout offered 3 2 1
How is the language 12 8 4 2
How is the handwriting 3 1 -1
Paper design 3 1 -1
TOTAL MARK
The experiment is designed to prove whether air pressure really exists.
At the beginning of the experiment, I prepared the materials, including a boiled egg, a glass bottle whose neck is a bit smaller than the egg, and some hot water. With all the things prepared, the experiment began.
First, I removed the shell of the egg. Then, I carefully poured some hot water into the bottle, and shook the
Post-writing: Reference Text
bottle gently. After a few minutes, I poured out the hot water. Just at the same time, I quickly placed the egg on top of the bottle. To my amazement, the egg squeezed into the bottle at once.
After the experiment I can draw the conclusion that air pressure indeed exists, and it is very powerful. It is the force of the air that pushed the egg into the bottle.
Post-writing: Reference Text
The experiment is designed to prove whether air pressure really exists.
At the beginning of the experiment, I prepared the materials, including a boiled egg, a glass bottle whose neck is a bit smaller than the egg, and some hot water. With all the things prepared, the experiment began.
Post-writing: Reference Text
目的是
水煮鸡蛋
（物体的）颈部
First, I removed the shell of the egg. Then, I carefully poured some hot water into the bottle, and shook the bottle gently. After a few minutes, I poured out the hot water. Just at the same time, I quickly placed the egg on top of the bottle. To my amazement, the egg squeezed into the bottle at once.
Post-writing: Reference Text
倾倒，倒出
轻轻地
倒出
放置，安放
挤入
After the experiment I can draw the conclusion that air pressure indeed exists, and it is very powerful. It is the force of the air that pushed the egg into the bottle.
Post-writing: Reference Text
结论；推论
存在
强有力的
力量
IV
Language points
Language points: Important sentences
1. The experiment is designed to prove whether air pressure really exists.
whether 从句在动词prove 后作宾语，即宾语从句，意为“是否”。
例如：
I asked him whether he had done it all by himself.
Language points: Important sentences
2. I prepared the materials, including a boiled egg, a glass bottle whose neck is a bit smaller than the egg, and some hot water.
including 在句子中为动词的现在分词充当状语。
例如：Six people were killed in the conflict, including a policeman.
whose在句子中引导定语从句，意为“谁的”，即“a glass bottle’s ”, 在从句中作定语。
Language points: Important sentences
3. With all the things prepared, the experiment began.
With的复合结构：with + 宾语 + 宾语补足语
即with + 名词 / 代词 + 非谓语动词 / 介词短语 / 副词 /形容词 / 名词。
句中all the things 和prepare 之间为被动关系，所以用prepare的过去分词表示被动。
Language points: Important sentences
4. It is the force of the air that pushed the egg into the bottle.
本句为强调句型
结构为it is / was+ 被强调部分 + that / who + 句子剩余部分
意为“正是……”
例如：
It was with your generous help that I could pass the exam.
V
Homework
Homework
Do an experiment following the teacher’s direction, and write a report about the experiment.