课件28张PPT。Module 5
A lesson in a lab
-----WritingA LaboratoryIntroduction【诱思导学】
1.Do you like doing scientific experiments? What are the stages of a scientific experiment?
2.What will happen when the air in the balloon is released(release:释放)?
.
【答案】 When the balloon's mouth is open,the air will push the balloon to move.●教学目标
本课时主要是通过学生对学案所给出的内容的学习,了解本课文中所出现的词汇,初步了解课文以及相关的背景知识,对下一堂课对课文的全面理解起到一个铺垫作用。教师用书独具演示●教学地位
该部分列举了与科技、实验有关的词汇,并设计了三个练习活动。通过这三个活动,学生可以初步熟悉这些词的意义,为以后的各项学习活动做好准备。 ●新课导入建议
(1)Students read through the questions quickly:
How does water exist?
If you heat a metal, what change will happen?
What is steel made from?
What is the earth's surface mainly covered by?
How far is the sun from the earth?
How old is the earth?
Which is larger, the earth or the moon?Water exists as …………..Etc.
Introduction - 3.Quiz time.(4m) Choose the correct answers to the quiz in Part 1. Then listen and check your answers. Water exists as a solid, a liquid and a gas.
When you heat a metal, it expands.
Steel is a mixture of iron and other substances.
Two-thirds of the earth’s surface is water.
The distance of the sun from the earth is 150,500,500 kilometres.
The earth is 4.6 billion years old.
The earth is forty-nine times larger than the moon.Answers:
Look at the pictures collected by our classmates. Do you know the name of these equipment?test tube tongs balancecrucible beaker & glass rod Bunsen burner Since you are interested in doing scientific experiments, now let’s get to know some vocabulary and knowledge related to science and experiment.Sodium-Na
(钠) Potassium(钾) Calcium(钙) Magnesium(镁)Aluminium
(铝) Zinc
(锌) Iron
(铁) Copper
(铜)2413conclusion aim result method目标 方法 结果 结论aimmethodresultconclusionWhat is the correct order to describe the stages of a scientific experiment? If you want to learn scientific subjects well, what qualities should you have in your opinion? Discussion Observe the following experiment carefully and then write down: Task1、The aim is to write a secret message
with invisible (adj.看不见的,无形的,暗藏的) ink.
2、Put the stages in the correct order.
3、an experiment report1.
2.
3.
4. b squeeze the lemon and pour the juice into a containerf take your pen and dip it into the juicea write your message on a piece of paperg blow on the paper to dry the lemon juice 5. e light a candle with the lighter6. c hold the paper near the candle flame7. d the message appears when the
juice reacts with oxygen and
produces brown oxideswrite a secret message with invisible ink.Help/Apparatuswrite a secret message with invisible ink. a lemon, a small container, a pen, some
white writing paper, a candle and a lighter.the lemon and pour the juice into a container.dip it into the lemon juice. your message in lager letters on a clean piece of
white writing paper.blow on the paper to dry the lemon juice.light a candle with the lighter.hold the paper near the candle flame. gradually appears on the paper. The words are in a light brown color. the lemon
juice reacts with oxygen in the air.Help/Apparatus
to find out if sodium reacts with cold
water.
An Experimennt Report
to find out if sodium reacts with cold
water.
a container, cold water, sodium,
filter paper(滤纸), a pair of tweezers(镊子) (1)Half-fill the container with cold water.
(2)Take a piece of sodium out of the oil.
(3)Dry the sodium with the filter paper.
(4)Put the sodium into the water slowly
with a pair of tweezers.
The sodium burns. Sodium reacts most with cold water.An Experimennt ReportGW: apparatuses, conclusion, reacts, experiment, put, scientific This is a _________ _________ done in a lab.
First, get all the ____________ ready on the desk, a container(容器) half-filled with some cold water in it, some sodium(钠) and a pair of tweezers.
Secondly, ________ a piece of sodium into the cold water slowly with a pair of tweezers. Then a light will be seen and the piece of sodium is turning around very fast, and it lasts for a while untill the sodium disappears .
We can reach a __________ that
sodium _____ with cold water.
scientific experimentapparatusesputconclusionreactsSum upHow can you do a scientific experiment successfully?
First, we need to have an_____ and prepare _________ for the experiment before we do the experiment.
Second, we must use correct________to do
the experiment and watch carefully.
Then we can get the____and draw a________. aimapparatusesmethodsresultconclusion Science plays an important role in our daily life. So we should love science. And we should take the scientific attitude towards our work and study.
科学在我们的日常生活中非常重要,我们应该热爱科学,并且我们应该拥有一种科学的对待我们学习和生活的态度。HomeworkFinish Exercise 9 on P 93.
See you!