Vt. 混合
n. 混合物
··· ··· 的混合物(词组)
mix
mixture
a mixture of··· ···
n. 演讲n.演讲者,讲师
lecture
lecturer
1.
2.
3. Vt.使惊讶astonish
astonishing
astonished
令人吃惊的
吃惊的,惊讶的
n.电electricity
adj.与电有关的,电学的
adj.带电的,导电的 electric
electrical
电器设备(词组) electrical equipment
5. 设备,装备 [U] equipment
n. 电学家,电工 electrician
4.
最新设备(词组) the latest equipment
6.在 ···顶部7.在 ···底部8.得出结论9.科学实验10.没有空气的水11.试管12.按顺序整理 /摆放
at the top of
at the bottom of
draw/ come to/ arrive at a conclusion
scientific experiment
air-free water
a test tube
put sth. In order
Put everything in order before you leave the room
离开房间前把所有的东西都整理好
Potassium 钾 Sodium 钠
Calcium 钙 Magnesium 镁
Aluminium 铝 Zink 锌
Iron 铁 Copper 铜
Match the metals with pictures
popotatassiumssium
sodiumsodiumcalciumcalcium magmagnenesiumsiumalualumiminiumnium zinczincironiron
coppercopper
Passages A
Fast-reading
Choose the best title for the passage
A. Different Uses of Metals
B. The Reaction of Metals
C. The Reaction of Metals with OxygenTip : Pay attention to the first and the last sentence to get the
best title
Passages A
Careful reading1. Which metal reacts the most with oxygen and
water?
2. What should we know when we use metals?
3. Which metals react with steam?
4. Does iron have a slow or fast reaction with steam?
5. What happens when you heat magnesium in oxygen?
It burns to form an oxide.It burns to form an oxide.
Magnesium, aluminium, zincMagnesium, aluminium, zinc
Slow.Slow.
Potassium, Calcium, Sodium
react Vi (化学)反应reaction n. 反应部分反应
和 ···有反应
对 ···有反应
对 ···有影响,起作用
反抗,对抗
partial reaction
Iron reacts with water and air to produce rust
How did Wilson react to your idea?
Many people react against tax increase(增税 )
react on/upon
• It is important toIt is important to know how they know how they react with different substancesreact with different substances..
It is +adj.+ (for sb) +to do sth
对于我来说回答这个问题很简单It is easy ( for me ) to answer this question. TranslationTranslation:
对于我们来说学好英语很重要It is important ( for us ) to learn English well!
A Simple Scientific Experiment
• scientific experiment
Apparatus [,æpə‘reitəs]
设置,装备,仪器
Bunsen burnerBunsen burner
test tubetest tube
tube holdertube holder
Put these words in the correct order to describe
the stages of a scientific experiment.(排序 )
Conclusion aim result method
Read passage B to check the answer
Passages B
Fast-reading
Conclusion
Aim
Method
Result
the stages of a scientific experiment
1.2. 3.
4.
cotton woolcotton wool
nailsnails
waterwater waterwater
waterwater
The nails The nails haven’t rusted.haven’t rusted.
The nails doThe nails do
not rust.not rust.
The nails The nails rust.rust.
Task: read carefully and then fill in the table.
Iron doesn’t rustIron doesn’t rust in dry air.in dry air.
Iron doesn’t rustIron doesn’t rust in air-free air.in air-free air.
Iron rusts in Iron rusts in ordinary air.ordinary air.ConclusionConclusion
Summary• 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.
airair
doesn’tdoesn’t rustrust
boilboilmakemake suresure
AddingAddingkeepkeep nailsnails
air-freeair-free
half-fillhalf-fill
ordinaryordinary