外研版 (2019)Unit 3 The world of science多媒体教学课件ppt

这是一份外研版 (2019)Unit 3 The world of science多媒体教学课件ppt，共21页。PPT课件主要包含了Materials ，Hot water，Procedure ，Results，Main body ，Conclusion，参考范文等内容，欢迎下载使用。

Unit 3The wrld f science
T read the instructins fr the experiment T learn t analyse the structure f an experiment instructinT learn t write a reprt f the experiment
Read the instructins fr the experiment and answer the questins.
Magic bttle
Writing an experiment reprt
A biled egg
A glass bttle (bttleneck a bit smaller than the egg)
Remve the shell f the egg.
2. Carefully pur sme ht water int the bttle.
the crrect r usual way f ding sth. 步骤，程序
3. Shake the bttle gently.
4. Pur ut the ht water.
5. Quickly put the egg n tp f the bttle.
Nte: D the experiment under the instructins f a teacher.
1. What d yu think the result 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.
Cmplete the bxes with the infrmatin in Activity 5. D further research if necessary.
Intrduce the aim f the experiment.
This experiment is designed t _____________________________________________________________________________________________________________________
shw that air pressure indeed exists and it is very pwerful.
Describe the materials used in the experiment and explain the prcedure.
I prepared_____________________________________ t d this experiment.Prcedure : ________________________________________________________________________________________________________________________________________________________________________________________
a biled egg, a bttle, sme ht water
First, remve the shell f the egg. Then, carefully pur sme ht water int the bttle and shake the bttle gently. At last, pur ut the water and put the egg n the tp f the bttle.
Reprt the results and what yu have learnt.
After the experiment, I can draw the cnclusin that ________________________________________________________________________________________.
Nw write a reprt f the experiment.
the air pressure exists, and it is the frce f the air that pushed the egg int the bttle
An experiment reprt explains r explres smething, such as the planning f a prject, r the slutin f a prblem. It mainly deals with prcesses and results. The mst imprtant quality f experiment reprt is clarity. 实验报告是对客观事实的阐述，措辞应真实严谨，准确恰当。写实验报告属于应用文，描述实验时，时态以一般现在时为主，人称以第三人称为主。
Hw t write an experiment reprt?
主体内容实验报告需要客观地介绍实验的整个过程。可以按照实验目的→实验器具→实验方法→实验结果的顺序依次进行说明。介绍实验步骤时，可适当使用表示顺序的词汇，使叙述条理、清楚。常用表达★描写实验目的：in rder t find ut if ... d research n the hpe f ... with the purpse f discvering ...
★实验器具：Bunsen burner, crucible, irn nail, test tube, tngs, balance, empty bttle, match ...★描写实验的方法或过程：add ... t ... pur ... int the experiment as fllws ... Secndly ... Thirdly ... Finally ... Then ... Next ... After that hurs' later after several daysfind a better way f ding ...
★描写实验结论：in cnclusindraw / cme t the cnclusin that can cnclude frm this experiment that ...★描写原因和结果：result in / lead t / cause reasn is that is because ...
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. 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.
Write a reprt f an experiment that yu’ve learned in yur chemistry r physics class. If necessary, yu can turn t the Internet fr help.