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视频标签：A Simple,Scientific,Experiment
所属栏目：高中英语优质课视频
视频课题：高中英语外研版必修1 A Simple Scientific Experiment山东省 - 淄博
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教学设计
A Simple Scientific Experiment
【教学目标】
1. To learn words about experiments and know how to do an experiment.
2. To be able to tell the main points in the text. 3. To build up the love for science. 【教学方法】
本节课采用听、说、读、写、看的语言教学方法，通过老师的实物展示，亲自动手操作实验以及课文的学习，最终能够让学生恰当运用和实验有关的词汇，掌握实验报告的写法。整堂课把任务的完成分成几个部分准备，而不是一次性放在整堂课的最后，让所有的同学都能够参与课堂，通过采用阅读、听力、口语表达相结合的教学策略，侧重于提高学生用英语获取信息、处理信息、分析信息和解决问题的能力。通过开展个人活动和小组活动，将合作、探究与独立思考结合起来，增强学习英语的信心，敢于用英语表达自己的观点，培养热爱科学的精神。 【课前学习活动设计】
Read the passage and answer questions.
An Incident in the Chemistry Lab
One Monday morning, Paul and his classmates were in the science laboratory for their practical chemistry lesson. The students were going to work in pairs to do an experiment. Before they began, the
teacher gave them this description of the different stages of the experiment.
Stage 1: Prepare the equipment: a test tube, a crucible, a Bunsen Burner and tongs.
Stage 2: Weigh 5 grams of baking soda(sodium bicarbonate) and put it in a crucible.
Stage 3: Heat 10 ml of hydrochloric acid(盐酸) in a test tube. Stage 4: Pour the warm acid onto the baking soda and continue to heat the mixture.
Result: The acid reacts with the bicarbonate(碳酸氢盐) to form water, carbon dioxide gas and salt. The hotter the mixture, the quicker the reaction. Continue to heat the mixture until the water evaporates, leaving the salt in the crucible.
Paul and his partner followed the instructions and set up their equipment. Paul went to the cupboard to get a bottle of hydrochloric acid. He found that there was only one bottle in the cupboard so he took that. There was no label on the bottle and Paul didn’t check with the teacher that it was the right solution. He measured the liquid and poured it into a test tube. Using tongs to hold the test tube, he heated it over the Bunsen burner. That’s when tings started to go wrong. The liquid in the test tube was not hydrochloric acid. When it was heated, it formed a thick cloud
of white gas. Soon the room was full of this strong smelling white gas.
All the students started coughing and their eyes hurt. The teacher immediately opened the windows and ordered the students to leave the laboratory at once. She realised that the liquid was acrylamide(丙烯酰胺) and that it is poisonous.
Fortunately, nobody was injured in the incidents. However, it taught the students and the teacher a good lesson. Never leave a bottle without a label in the chemistry lab! Answer the questions:
1. What mistake did Paul make? 2. Why did he make the Mistake?
3. Why did the teacher send the students out of the room? 4. What lesson did the incident teach the students and the teacher? 【设计说明】通过课前阅读，让学生了解在做实验过程中的一点注意事项，为课堂上的情感提升阶段做铺垫。 【教学过程】
Teaching procedures: StepⅠLead-in
Do an interesting experiment to let the students watch carefully and lead in the topic.
【设计说明】通过导入环节一开始就吸引了学生兴趣，并让学生知道在
做实验的过程中要仔细观察，为下面提升科学素养做准备。 StepⅡ Watching and Reading
1. Show the students some equipment and learn some words about apparatus.
2. Invite their chemistry teacher to show an experiment.The English teacher explains it in English. Let them watch and listen carefully.
3. Read the passage A Simple Scientific Experiment and finish two tasks.
①What’s the aim of the experiment?
__________________________________________________________ ②Fill in the chart.
in dry air
In
air-free water
In
ordinary
water
method
___ some iron nails ________ a tube,
_____some cotton wool____the tube,_____the
tube for one week ____ a tube ____ water, ____ the water ____ nails in the water, ____oil __ the
water,____the
tube for one
____ a tube ___ water,
____ nails,
____ the tube for one week
week
result
nails_____ rusted
nails___ rust in the ____ with air-free water
nails _____ in the tube with _____water conclusion
iron doesn’t rust in ____ air Iron doesn’t rust in ______ water
____ rusts in ordinary water
4. Use some animation to check the answers.
【设计说明】通过实物展示、邀请学生的化学老师展示实验以及英语老师的英语讲解，让学生仔细观察并阅读文章，不仅让学生掌握了与实验和课文内容相关的词汇和短语，还在英语课堂上有了和在化学实验室不一样的实验乐趣，能用另一种语言来思考实验。还通过动画展示实验，进一步掌握了文章内容，提高了学生用英语获取信息、处理信息、分析信息和解决问题的能力，并让学生用化学知识来回答相关问题，把化学知识融合到英语学习中。 StepⅢ Summary
Learn how to write a report on a simple scientific experiment and finish the mind map.
A report on a scientific experiment
【设计说明】上面几个环节的设计都是为这个环节做铺垫，用本环节总结以上步骤，就得出了实验报告的写作环节，为下面的写作做好准备。 StepⅣ Discussion
1. Check the pre-class task and answer some questions.
2. Discussion: What should you pay attention to when you are carrying out an experiment?
【设计说明】通过课前任务展示、小组讨论活动、个人展示，提高口语表达能力，并思考总结在做实验过程中的注意事项，提升情感态度价值观。
StepⅤ Listening
1. Listen to a material about an experiment, take notes and put the stages in the correct order.
2. Do the experiment in groups according to the listening material following the tips.
【设计说明】通过自主学习和合作学习的形式完成此任务。让学生们从
听力材料中获取信息，以小组合作的形式让学生都参与亲自动手实验，并用英语交流，展示他们的实验成果，进一步提升他们做实验的热情。
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