Module 5 A Lesson in a Lab

(共27张PPT)
Cloning (克隆）
What scientific achievements we have got in recent years
A lesson in a lab
Module5
1.What can you see in the picture
2.What other words can you think of when you look at the picture
scientific
experiment
apparatus
equipment
Bunsen burner
test tube
tube holder
Put these words in the correct order to describe the stages of a scientific experiment
Conclusion aim result method
Aim
Method
Result
Conclusion
Passage B
A Simple Scientific Experiment
Can we put iron nails in wet air
rust
Predictions
Do Iron nails rust in dry air
Do iron nails rust in air-free water Do iron nails rust in ordinary water
No, they don’t
No, they don’t
Yes, they do
Now listen to the tape and check your predictions
1.Scanning
True or false.
Iron rusts easily in dry air.
To make sure there’s no air in the water, you have to boil the water for 3 minutes.
We don’t know whether iron rusts in ordinary water.
F
T
F
2.Detailed-reading
1. Can you guess the meaning of the word “apparatus” through the context
2. Have you known all of the apparatuses of this experiment
3. In the second part of the experiment, why must you boil the water
And then why do you add some oil to the water
equipment
3 clean iron nails; test tubes; test tube holder; cotton wool; oil; Bunsen burner
Make sure there is no air in the water
keep air out of the water
cotton wool
nails
Iron does not rust in dry air
water
Iron does not rust in dry air
water
water
The iron rust
A Simple Scientific Experiment
Conclusion: iron rust in ordinary water
Aim
Apparatus
Method
Result
Conclusion
To find out if...
Iron nails, test tubes, oil, tube holders,
cotton wool, Bunsen burner
(3) half-fill...with, add, leave...for
After a week, rust
( not ) rust in
(1) put...at the bottom of; push...down
leave...for
(2) half-fill...with..., boil, put, add...to,
keep...out of, leave...for
3.reading & Fill & say
4.Complete the sentences
using what we learnt
In the first part of the experiment, the ____ is dry. It shows that iron ___________ in dry air.
In the second part, you must _____ the water to ______ _______ that there is no air in it. ______ some oil to the water can ______ the air out of it. It shows that _____ don’t rust in ____________ water.
In the third part, _______ the tube with water. It shows that they rust in _________ water.
air
doesn’t rust
boil
make sure
Adding
keep
nails
air-free
half-fill
ordinary
Homework :
Do an experiment about Potassium(钾）reacts with cold water and write a simple experiment report
Aim
Apparatus
Method
Result
Conclusion
to find out if potassium reacts with cold water.
a breaker, cold water, a spoon,
potassium
Half-fill the container with cold water.
(2) Put a spoonful of potassium into
the water.
The potassium burns.
Potassium reacts with cold water.