资料简介
Lead-in
What can you see in a lab?
test tube
test tube holder
cotton wool
Bunsen burner
balance
tongs
iron nails
metals
• How many metals do you know in a lab?
• How do they react with different
substances?
New words
react steam（水蒸汽） heat(v)
form(v) substance burn
oxide equipment（设备） partial
aim conclusion
Read the passage and choose
the best title for it.
The Different Uses of Metals
The Reaction of Metals
The Reaction of Metals with Oxygen
(paragraph 1)
(paragraph 1 and the
table)
( the table)
True or False
• 1. Different metals have the same uses.
• 2.when we use metals,knowing how they
react with different substances is not
important.
• 3. The reaction of metals with these
substances can be put into order.
F
F
T
Metals Heated in oxygen Reaction with water or
steam
Potassium
Burn to form an
oxide
Reacting with cold
waterSodium
Calcium
Magnesium
Reacting with steamAluminium
Zinc
Iron Reacts slowly Partial reaction
Copper Partial reaction No reaction
The Reaction of Metals
Read the table . Answer these
questions.
1. Which of the metals in the table reacts
the most with oxygen and water?
Potassium, calcium and sodium.
2. What happens when you heat calcium
in oxygen?
It burns to form an oxide.
3. Which metals react with steam?
Magnesium, aluminium and zinc.
4. Does iron have a slow or fast
reaction with steam?
It has a slow reaction.
5. Does copper react with water?
No, it doesn’t.
How to make a scientific experiment
report ?
A Simple Scientific Experiment
words
below (adv)（在下面 ） aim apparatus（器材）
half-fill（把...装满一半 ） test tube cotton wool（药棉）
bunsen burner （本生灯）
B. aim
D. method
A. result
C. conclusion
Put these words in the correct
order to describe the stages of a
scientific experiment.
• Read the introduction, aim and
apparatus , then answer the questions.
• 1.Introduction:
• What does the scientific experiment show?
• 2.Aim:
• 3.Apparatus:
Read the parts of green title and fill in
the table.
Iron in
dry air
Iron in
air-free
water
Iron in
ordinary
water
Stage A
(starting
experiment)
cotton
wool water water
Stage B
(1 week
later)
Stage C
(Result)
nails
water
Iron does
not rust
Iron does
not rust
Iron rusts
Iron in dry air
• Method
• (1)Put…at…
• (2)Push…down…
• (3)Leave…
• Result: After one week ,the nails have not rusted.
• Conclusion: Iron does not rust in dry air.
Iron in air-free water
• Method
• (1)Half-fill…
• (2)Boil…(This makes sure…)
• (3)Put…in…
• (4)Add…to…
• (5)Leave…
• Result: After one week ,the nails have not rusted.
• Conclusion: Iron does not rust in air-free water.
Iron in ordinary water
• Method
• (1) Half-fill…and add…
• (2)Leave…
• Result: After one week ,the nails rust in the tube with
ordinary water.
• Conclusion: Iron rusts in ordinary water.
1. In the first part of the experiment,
the ___ is dry, not wet.
2. It shows that iron ___________ when
the air is dry.
3. In the second part of the experiment,
you must ____ the water to make
sure there is no ___ in it.
air
does not rust
boil
air
Complete the sentences.
4. You add ________ to the water
because this keeps ___ out of it.
5. It shows that ____ does not rust in
water that has no ___ in it.
some oil
air
nail
air
Try to make a simple experiment report:
How does Magnesium react heated in oxygen?
镁条燃烧前后质量的测
定视频1_标清.mp4
Help you
aim：To find out if magnesium burns to form an oxide with oxygen.
Apparatus：magnesium rod 镁条 balance天平 tongs夹子 Bunsen
burner本生灯
Method：
（1）Weigh称重…(第一次称重)
（2）Burn...（点燃镁条）
（3）Weigh…（第二次称重）
(4)compare比较…（比较前后两次重量的变化）
Result:… heavier than…
Conclusion: Magnesium burns to form an oxide with oxygen
Make a simple experiment report
How does Magnesium react heated in oxygen?
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