初中英语Lesson 25 Let’s Do an Experiment!课文ppt课件

这是一份初中英语Lesson 25 Let’s Do an Experiment!课文ppt课件，共23页。PPT课件主要包含了jar，raincoat，put，fill，with，cover，turn，upside，down等内容，欢迎下载使用。

What are they ding?They are ding an experiment.
Talk freely
Have yu ever dne any experiments? D yu like t d experiments?
He is puring sme water.
He has much frce.
Yur answer is crrect.
Turn the jar upside dwn.
experimentjarupsidepurcrrectscientific
n. 实验；试验n. 广口瓶；罐子n. 上部；上边v. 倒出；倾倒adj. 正确的；恰当的adj. 科学的
methdraincatfrcepressurecnclude
n. 方法；办法n. 雨衣n. 力量；v. 迫使；强迫n. 压力，压强；挤压v. 得出结论；断定
Listen and find ut what we need t d the experiment.
a piece f cardbard
Read the lessn and answer the des Danny think they shuld d the experiment? 2.What keeps the water in the jar?
He thinks they shuld d it utside.
The frce f the air.
3. Is Jenny sure f her thery? Hw d yu knw?4. Why des Danny put n his raincat? 5. What des Danny cnclude?
Yes, she is. She thinks that Brian can d the experiment ver Danny’s head.
He thinks the water will pur ut.
The air is strnger than he thught.
Read the lessn and fill in blanks.
Let’s d an interesting experiment. First, I ____ a jar _____a desk, ____it _____ water, then _____ the tp ____ a piece f cardbard. When I ____ the jar ______ _______, can yu guess what will happen?
Read the experiment. Put the sentences in the crrect rder.□Put a piece f cardbard ver the jar.□The jar f water is upside dwn，but the water stays in the jar. This is because air pressure pushes the cardbard nt the jar.□Fill the glass jar with water.□Turn the glass jar ver quickly. Hld yur hand n the cardbard fr a few secnds.□Remve yur hand frm underneath the jar. What happens?□There is mre air utside the jar than inside，s there is mre air pressure utside than inside.
2 5 1 3 4 6
The Scientific Methd ReprtName: _______________________________________Material: _______________________________________Prcedure(过程): 1. Fill _____ with _____. 2. Cver ______ with _________________ and hld it there.
The frce f the air/The air pressure
a jar, a piece f cardbard, sme water
a piece f cardbard
3.Turn the jar ___________.4. ____ hand ____ the cardbard.Results: __________________________Cnclusins: ___________________________________________
The frce f the air keeps the water in the jar.
The water stays in the jar.
Translate the phrases.做实验用……装满……用……盖住……把……从……拿开涌出，倒出
d an experiment/experimentsfill … with …cver … with …take … ff …pur ut
科学方法确信…………的力量足够强大
scientific methdbe sure f/t d/thatthe frce fstrng enugh
翻译下列句子，每空一词。1. 我确信你是一个诚实的人。I ______ ______ that yu are an hnest man.2. 请用一块玻璃盖上那个杯子。Please ______ the cup _____ a piece f glass.3. 小心，否则你会弄湿的。Be careful, r yu’ll ______ ______.4. 把箱子倒过来，你会找到标签的。______ the bx _______ _______, then yu’ll find the label.
am sure
cver with
get wet
Turn upside dwn
Discuss in grups. In this experiment, what will happen when yu use less water, mre water, wet cardbard, r different kinds and sizes f jars.