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Unit 8 Lesson 22
教学目标
发现、归纳if条件状语从句的语意功能。
2. 通过习题的操练 ，正确运用主句和从句的时态。
核心素养
实践创新
1.劳动意识：通过对灾难的应急措施的表达 ，正确恰当的使用 if条件状语从句。
2.技术运用;培养学生在遇到突发紧急事件时，自救和帮助他人的意识。
教学重点
通过对文本的理解与参与活动1，感知条件状语从句的意义
教学难点
培养学生在遇到突发紧急事件时，自救和帮助他人的意识。
教学过程
一、导入新课
Warm-up
Have you seen this picture What’s this
7月23日，美国国家航空航天局(简称为NASA)宣布发现开普勒-452b，是迄今为止与地球最为相近的行星。该行星距离地球1400光年，NASA将其命名为“地球2.0”，因为它是第一颗人类在宜居带里与太阳相似的恒星附近发现的行星。
NASA on 23rd,July announced the discovery of
Kepler-452b,the most Earth-like planet ever found.Located 1,400 light-years from our planet,NASA called it“Earth 2.0”,because it’s the first planet discovered in the habitable zone of a G star similar to our sun.
1.与太阳相似的恒星被发现
这颗系外行星编号Kepler 452b，其直径约为地球的1.6倍，与恒星之间的距离与日-地距离相近。恒星Kepler 452距离地球大约430秒差距(约合1400光年)，位于天鹅座。
天文学家称，这是至今为止发现的最接近地球的“孪生星球”，跟地球的相似指数为0.98，并且有可能拥有大气层和流动水。
NASA说这个星球上可能有活火山，有存在生命的可能性，行星应该有60亿年历史，地球为45亿年。
2.宇宙中最遥远星系被发现
科学家使用位于夏威夷的凯克天文台的望远镜发现了新星系，并将这个星系命名为EGS-zs8-1。它是迄今发现的最遥远星系，打破了此前的观测纪录。
An international team of scientists said they have discovered the farthest galaxy ever measured in the universe.
By using a powerful instrument called MOSFIRE on the Keck I telescope at the Keck Observatory in Hawaii, the team thought that the galaxy, EGS-zs8-1, formed more than 13 billion years ago at a time when the universe was only five percent of its present age.
…you may not have more than twelve months to live.”
How would you feel
二、新课讲解
paragraph 2
“…not expect to survive that long….engaged…”
Stephen Hawking
paragraph 3
…time…
…universe …begin
…black holes…
paragraph 4
paragraph 5
A Brief History of Time
science
Misunderstandings…
Careful Reading
Read the text again and answer the following questions
1. How would most people feel when they were told that they had an incurable disease
They will probably feel very sad and give up their dreams and hopes for the future.
2. What did Hawking do when he was told so
Instead of giving up, he went on with his research, got his PhD and married the girl. He continued his exploration … and traveled …to give lectures.
3. For what did Hawking become famous in the 1970s
He became famous for having made new discoveries about the Big Bang and black holes with Roger….
4. What did Hawking explain in the book A Brief His - tory of Time
--In the book, he explains both what
it means to be a scientist and how science works. He tells readers how discoveries are made and how ….
5. According to Hawking, how do people misunderstand science
People often think that science is about “true” facts that never change. Scientists, on the other hand, know that their job is never finished and that even the best theory can be turned out to be wrong.
6. What are the basic steps of the scientific method
(l4-p.4)—first, observe—then, explain-build a theory
—finally, test the theory-if it matches-if it can predict
—use experiments—use a model to test the theory
7. What is it that Hawking doesn’t like about his speech computer
The only trouble is that it gives Hawking,who is
British, an American accent.
(It is the American accent that Hawking doesn’t like about it.)
Groupwork
Work in group of four and have a discussion. Choose one of the three topics which your group members are interested in and list what you shall do or not do if an earthquake/fire/flood happens so that we will be able to survive.
Save people around us
Arrange to help others
Videos are just the beginning
Encourage more people to take actions
Group Work
Which discovery do you think is the most important according to the text
Example:
A: I think X-rays are the most important discovery.
B: Why
A: Because with X-rays, doctors can help fix broken bones more easily.
….
三、作业
1.Finish Ex 1 on P99.
2.If you live in school or travel around for more than 10 days, what will you take in your medicine bag（急救包） Discuss with your partner, and write down on the worksheet.

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