冀教版九年级上册Unit 5 Look into Science Lesson 25课件(共18张PPT)

(共18张PPT)
Unit 5
Look into Science
冀教版　九年级
What is Mr. bean doing
Do you like to do an experiment
He is doing an experiment.
n. [ k'sper m nt]
Lesson 25
Let’s Do an Experiment!
It is a
It is the jar’s
He is ing water.
pour
[p (r)] v.
upside n. [' psa d]
jar.
[d ɑ ] n.
We wear s on a rainy day.
He has much .
raincoat
['re nk t] n.
force
[f s] n. /v.
If your answer is ,
you can get one mark.
We need to use
to do everything.
scientific
[ sa n't f k]
adj.
method
['meθ d] n.
correct
[k 'rekt]
The air is stroger than I thougt.
I d the result by doing the experiment.
conclude
[k n'klu d] v.
pressure
['pre ] n.
experiment [ k‘sper m nt]
upside [' psa d]
jar [d ɑ ]
pour [p (r)]
raincoat ['re nk t]
force [f s]
correct [k 'rekt]
scientific [ sa n't f k]
method ['meθ d]
pressure ['pre ]
conclude [k n'klu d]
( )1. What do we need in the experiment
A. a jar B. a raincoat C. water
D. a piece of paper E. a piece of cardboard F. a desk ( )2. Where does Danny think they should do the experiment A In the classroom B outside C In the room
( )3. What keeps the water in the jar A A piece of cardboard B Brian's hand
C The air pressure
B
ACE
c
Some important phrases
1 用水充满一个广口瓶 air pressure
2 用一块硬纸板覆盖顶部 put a jar on the desk
3 把广口瓶翻转过来 fill a jar with water
4 把广口瓶放在桌子上 water stays in the jar
5 把手从硬纸板上拿开 cover the top with a piece of cardboard
6 大气压强 turn the jar upside down
7 水留在广口瓶里 take the hand off a piece of cardboard
1. Cover the top with a piece of cardboard.
2. The water stays in the jar. Air pressure pushed
the cardboard onto the jar.
3. Fill the glass jar with water.
4. Hold your hand on the cardboard for a
few seconds.
5. Turn the jar upside down.
6. Take your hand off the cardboard.
Read the dialogue again. Put the steps in the
correct order.
1
2
3
4
5
6
Come to the blackboard and do the experiment as we describe it.
1. Fill the jar with water.
2. Cover the top with a piece of cardboard.
3.Turn the jar upside down.
4. Hold your hand on the cardboard.
5. Take your hand off the cardboard.
6. Water stays in the jar.
Work in pairs and think of this experiment.
Discuss it and write down how we do it.
How should we do the experiment
Doing an experiment is interesting. First, we ___ a jar ___ a desk, ___ it ____ water, then _____ the top ____ a piece of cardboard. When we ____ the jar ______ _____, can you guess what happened The air helps the cardboard hold the water in the jar.
put
on
fill
with
cover
with
turn
upside
down
pressure
New words:
experiment; scientific; method; jar; upside; pour; raincoat; pressure; force; conclude; correct
Phrases :
fill…with cover …with…
turn …upside down
SUMMARY