高中英語 選必B2U6-第四課時(shí)-Developing Ideas 課件

1、2021年春季深圳市線上課程高一英語深圳市教育科學(xué)研究院教學(xué)材料：外研版高中英語新教材 選擇性必修第二冊教學(xué)內(nèi)容：Unit 6 Survival第三課時(shí)：Developing Idea執(zhí)教人：馬思妍/深圳市羅湖區(qū)羅湖高級中學(xué)Oct. 6, 2021Plan B: Life on Mars?Before ReadingWhere is Mars ? Whats the distance between the Earth and the Mars?The distance between them is 55 million km when the Mars is nearest to the

2、Earth and 400 million km when farthest. The Mars moves nearest to the Earth every 15 years.Before Reading1. Mars is the _ smallest planet in the solar system. a. second b. third c. fourth2. The surface of Mars is covered in _. a. rocks b. water c. grass3. The average recorded temperature on Mars is

3、_. a. 40C b. 2C c. -63C4. One day on Mars is about _ long. a. 18 hours b. 24 hours c. 37 hoursWhile Reading: Main IdeaPara 1Para 2Para 3Para 4Para 5Summarize the main idea of each paragraphConsidering great risks to life on Earth, humans Plan B for Earth is put forward. Humans consider Mars the most

4、 likely choice and have more and more interest in its exploration.Humans have sent spacecraft and robots to Mars for research. In order to make Mars a second home, humans have conducted experiments to simulate Mars-like environment.Before human settlement of Mars, people should protect the Earth bet

5、ter. While Reading: Text AppreciationFearIn the 1960s and 1970sToday nuclear missilesenvironmental problemsSolution Scientists are thinking of ways to lower this risk, such as replacing coal and oil with forms of renewable energy. But they are also preparing for the worst: what can we do if the terr

6、ifying scenes in films such as The Day After Tomorrow happen in real life? What is our Plan B for Earth?Para 1While Reading: Text AppreciationPara 2Plan BOne option is to explore other planets to see if we could live on them. The most likely choice is Mars, which is relatively close to Earth and has

7、 environment less hostile than that of other planets.Martian ExplorationMars has fascinated people since ancient times, and today our interest in Martian exploration is greater than ever before. Films such as The Martian enjoy worldwide popularity. the Mars Desert Research Station The Mars Village i

8、n North-west Chinas Qinghai Province.While Reading: Text AppreciationPara 3UnmannedMannedEncouraged by discoveries over the years, space agencies of various countries are planning manned missions to Mars that could take place within the next 25 years.Since the 1960s, we have been sending unmanned sp

9、acecraft to Mars. Our probes have orbited the planet, sending back valuable data and stunning images. Our robots have explored the Martian surface, testing the soil and searching for resources, water and signs of life.While Reading: Text AppreciationPara 4ChallengesBiosphere 21. Sending people there

10、 will require all the skill, courage and intelligence of the human race.2. It would take months to reach Mars, travelling through dangerous solar radiation.3. Even if the first settlers do reach Mars safely, they may not be able to return to Earth ever.4 Staying alive will be a daily challenge, but

11、not impossible.As early as 1980s, scientists were building Biosphere 2 in the Arizona desert. It consisted of a closed space in which people, animals and plants could live together.It did provide us with a better understanding of how humans might be able to live on another planet. More recently, sci

12、entists have succeeded in growing a variety of plants in an environment similar to that on Mars, which definitely is a big step forward.While Reading: Text AppreciationPara 5Until now, human settlement of Mars is still decades away. In the meantime, scientific research shows that the planet Earth is

13、 getting warmer. This change is being caused by human activity and is having a terrible effect on the biosphere. So, we need to take much better care of our own planet Earth.After ReadingChoose the magazine in which you would most likely find the passage and give your reasons.1 The Traveller2 All About Space3 Environmental Concerns4 Biology for FunChoose the statements that can be inferred from the passage.Humans have yet not visited Mars. People want to go to Mars on holiday.There are plants growing on Mars. The greatest to life on Earth used to be nuclear