《Listening and vocabulary》优质课教案下载

《Listening and vocabulary》优质课教案下载

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:

What mistake did Paul make?

Why did he make the Mistake?

Why did the teacher send the students out of the room?

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