资料简介
1.In order to keep healthy, we need to
drink______ water.boiled
2.As a student, we need to ____ a habit of
reading English every morning.
form
3.When we buy something ,we need
a ______ to weigh it.balance
4.From the discussion, we can come to
a __________ that we should
protect the environment.
conclusion
5.When we put salt into water, it will
_______ quickly.dissolve
Copper
Gold 金
Iron
Silver 银
Steel
铜 铁 钢
Potassium 钾Calcium 钙 Aluminum 铝
Magnesium 镁 Sodium 钠 Zinc 锌
1.What is important when we use different
metals?
2.Which metal reacts most and which
metal reacts least?
Passage A
Which one is the best title of Passage A?
1.The Different uses of Metals
2.The Reaction of Metals
3.The reaction of Metals with Oxygen
Questions about the table
1.Does copper react with water?
2.If we heat sodiun in oxygen, it
will_____________________.
3.If we heat iron in oxygen, it will___________.
burn to form an oxide
react slowly
pan
sodium
iron
Passage B
A Simple Scientific Experiment
Apparatus仪器
iron nails Bunsen burner
test tube
test tube holder
cotton wool
Passage B
In order to find out if ____________, we
need _______________.The methods are as
follows.
First,_____________________________.
(Then/Next/After that/)_________________.
At last,_____________________.
After one week,_____________________.
So, we can draw a conclusion that______.
Iron in dry air
In order to find out if ________________,
we need _____________________________
__________. The methods are as follows.
First,______________________________
___________.Next, ____________________
___________ At last,_____________________.
After one week,_____________________.
So, we can draw a conclusion that_________
___________.
Iron in dry air
iron rusts in dry air
some iron nails, a test tube, some
cotton wool
we put some iron nails at the bottom
of a test tube we push some cotton wool
down the tube leave the tube for one week
the nails haven't rusted
rust in dry air
iron does not
experiment report
aim
apparatus
method
result
conclusion
为了找出过氧化钠(sodium peroxide)是否可以和
二氧化碳(carbon dioxide)发生反应，我们将适量
的过氧化钠放进棉里包好，将它放在石棉网上，
通过吸管（straw)向棉花团里吹气，观察实验结果。
Difficult words:
适量的 (adj.) proper
石棉网 n wire net
吹气v. Blow
小勺 spoon
Discussion and Writing
In order to find out if ____________, we
need _______________.The methods are as
follows.
First,_____________________________.
(Then/Next/After that/)_________________.
At last,_____________________.
After one week,_____________________.
So, we can draw a conclusion that______.
In order to find out if sodium peroxide can
react with carbon dioxide, we need some sodium
peroxide, cotton wool, a spoon, a wire net and a
straw.The methods are as follows.
First, we put proper sodium peroxide into the
cotton wool with a spoon and fold it.Then,we
put it on a net wire. At last, blow on the cotton
wool with a straw.
We can see the cotton wool will catch fire
gradually.
So we can come to a conclusion that sodium
peroxide can react with carbon dioxide.
Practice makes perfect !
Homework
Cindy做了一个实验。为了比较橘子汁和油在
水中的溶解速度，他将水倒入两个试管里，
保证两根试管内的水量相等; 同时在一根试管
内放入一勺橘汁（a spoonful of orange
juice），在另一根内放入一勺油, 等待5分钟
后，橘汁溶解，但是油仍然留在水的表层。
查看更多
