必修 第三册Unit 3 The world of science备课ppt课件

这是一份必修 第三册Unit 3 The world of science备课ppt课件，共16页。PPT课件主要包含了Main body，Conclusion等内容，欢迎下载使用。

Pre-writing
Read the instructins fr the experiment and answer the questins. (P46-5)
1. What d yu think the results f this experiment will be?2. What can yu learn frm this experiment?
The egg will squeeze int the bttle.
The experiment shws us the effects f air pressure. Air pressure indeed exists, and it is very pwerful.
Watch Egg in a Bttle Experiment
While-writing：Writing an experiment reprt
Cmplete the bxes with the infrmatin in Activity 5. D further research if necessary.(P47-6)
prve whether air pressure really exists。
First, I remved the shell f the egg. Then, I carefully pured sme ht water int the bttle, and shk the bttle gently. After a few minutes, I pured ut the ht water. Just at the same time, I quickly placed the egg n tp f the bttle
air pressure indeed exists, and it is very pwerful. It is the frce f the air that pushed the egg int the bttle
Summarize the structure f an experiment reprt.
an experiment reprt
Intrduce the aim f the experiment.
Describe the materials used in the experiment and explain the prcedures.
Reprt the results and what yu have learnt.
While-writing
Write an experiment reprt. Use the expressins in the bx t help yu. D further research if necessay.(P47)
Useful expressins:· The experiment is designed / aimed t...· I prepared..., including...· First..., then..., after...· After the experiment, I can draw a cnclusin that...
Pst-writing
Pair wrk: Use the checklist t give feedback n yur partner’s draft.
Share yur reprt!
Individual wrk: Edit yur draft and then share yur bigraphy with the class.(P47-7)
The experiment is designed t prve whether air pressure really exists. At the beginning f the experiment, I prepared the materials, including a biled egg, a glass bttle whse neck is a bit smaller than the egg, and sme ht water. With all the things prepared, the experiment began.
Reference Text
First, I remved the shell f the egg. Then, I carefully pured sme ht water int the bttle, and shk the bttle gently. After a few minutes, I pured ut the ht water. Just at the same time, I quickly placed the egg n tp f the bttle. T my amazement, the egg squeezed int the bttle at nce.
After the experiment I can draw the cnclusin that air pressure indeed exists, and it is very pwerful. It is the frce f the air that pushed the egg int the bttle.