《Let's Do an Experiment》Look into Science! PPT免费课件
第一部分内容：Warming up
What kinds of experiments have you done in science class?
If you hold a jar that is filled with water upside down, what will happen?
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Let's Do an ExperimentPPT，第二部分内容：Reading
Read the lesson and answer the questions.
1. Where does Danny think they should do the experiment?
Danny thinks that they should do the experiment outside.
2. What keeps the water in the jar?
The force of the air. / The air pressure.
3. Is Jenny sure of her theory? How do you know?
Yes, she is. She is so sure of her theory that Brian can do the experiment over Danny’s head and he won’t get wet.
4. Why does Danny put on his raincoat?
Because he thinks he will get wet.
5. What does Danny conclude?
Air is stronger than he thought.
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Let's Do an ExperimentPPT，第三部分内容：Language points
1. Then I turn the jar upside down and take my hand off the cardboard.
然后，我把瓶子倒置，手离开纸片。
upside down 意思是“颠倒着，倒转着；乱七八糟”。
e.g. The canoe floated upside down on the lake.
独木舟底朝天漂浮在湖面上。
The children turned the house upside down.
孩子们把屋里弄得乱七八糟。
turn… upside down 把……翻转；倒过来
e.g. If you turn the envelope upside down, the key will fall out.
你如果把信封倒过来，钥匙就会掉出去。
take…off 把……拿开
e.g. Will you take your books off the table?
把你的书从桌子上拿走好吗？
【拓展】
take away & take off
在take away 与take off 这两个短语中，take 都是“拿、带”的意思，away 和off 是副词，都可以表示“离开、离去”的意思。
从字面意思及结构看，这两个短语很容易被混淆。其实，这两个短语的意思和用法相差很远。
take away 可表示“拿走”、“使离开”、“减去”等意思。如：
His sister wants to take away this book.
他的姐姐想拿走这本书。
The girl was taken away from school.
女孩被带离学校。
Take away 3 from 6 and you get 3.
6减3等于3。
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Let's Do an ExperimentPPT，第四部分内容：Homework
Try this experiment at home and use the scientific method to record the process and report the results.
You may also choose to take photos or draw pictures of the experiment.
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