Unit6 Survival Developing ideas 课文课件-2025-2026学年高中英语外研版选择性必修第二册.

该高中英语课件围绕“Plan B: Life on Mars?”主题，涵盖火星基本信息、探索历程、生存挑战及地球环境保护，通过“Lead in”环节的选择题（如火星位置、表面特征等）激活学生旧知，搭建从地球环境问题到火星探索的学习支架，帮助学生构建知识脉络。 其亮点在于融合电影片段（如《The Day After Tomorrow》）与跨文化素材，通过推断题、段落匹配等活动培养语言能力（信息理解与表达）、思维品质（分析与推断）和学习能力（策略运用）。例如推断题要求学生基于文本线索猜测，训练逻辑推理，助力学生提升英语综合运用能力，教师可借此开展高效主题式教学。

Plan B: Life on Mars? Where is Mars? How much do you know about Mars? Mars is slightly more than half the size of Earth, with corresponding lower gravity. It’s a dry, rocky planet, with white polar “ice” caps that consist mostly of frozen carbon dioxide. The average temperature on Mars is minus 63 degrees Celsius. A day on Mars is about as long as a day on Earth, plus about 39 minutes. Seasons and years are twice as long as they are on Earth. Since the 1960s, Mars has been the subject of several unmanned exploration missions. However, many such early missions failed. More About Mars It may be difficult to imagine when people will live on the planet Mars. 1. Lead in Para 1 Why do we have Plan B for Earth? Para 2--3 Why is Mars our Plan B? Para 4 What are the challenges of moving to Mars? Para 5 What should human beings do in the near future? 2. mathch the main ideals 2.While-reading Plan B: Life on Mars? Reasons Exploration Challenges Future Para 1~2 Para 3 Para 4 Para 5 Outline 9 3. Choose the magazine in which you would most likely find the passage and give your reasons.（P92 A3） Clues: By reading the passage, we know that today environmental problems have taken over as the greatest risk to life on Earth (paragraph 1). Scientific research shows that the planet Earth is getting warmer (paragraph 5). 4.Choose and share Choose the statements that can be inferred from the passage.（P92 A4） v.推断 基于一定知识的猜测 Now work in pairs and find evidence to support your choices. Read and choose Choose the statements that can be inferred from the passage.（P92 A4） not mentioned Para. 3 not mentioned Para. 3 Para. 4 What does “that” refer to？ 4 not mentioned Para. 3 Para. 4 Para. 1 not mentioned Para. 3 Para. 4 Para. 1 Para. 2 not mentioned Para. 3 Para. 4 Para. 1 Para. 2 Para. 1 not mentioned Para. 3 Para. 4 Para. 1 Para. 2 Para. 1 Para. 4 Read para 1 and answer the question: Q1. Why should we have Plan B for Earth? fears ________________ ________________ solutions Plan A: ______________________ Ways to lower the risk: renewable energy Plan B: ______________________ Find a new home outside Earth nuclear missiles (past) environmental problems (now) While-reading The Day After Tomorrow A clip of The Day After Tomorrow ______________________________________ Q2. Why does the author mention the film The Martian? To demonstrate that Martian exploration has _____________ people around the world. Q3. What efforts are we making? To educate the public on the Red Planet the Mars Village ______________________________________ ... Let’s read on! the Mars Desert Research Station Read para 2 and answer the question: fascinated Q4. How have human beings explored the Mars? sending unmanned spacecraft to Mars Probes--orbiting the planet Robots--Exploring its surface planning manned missions to Mars Read para 3 and answer the question: Q5. What are the challenges of moving to Mars? Q6. What did the Biosphere 2 experiment prove and achieve? Read para 4 and answer the question: solar radiation 1 2 3 4 It provided us with a better understanding of how humans might be able to live on another planet. Q6. What did the Biosphere 2 experiment prove and achieve? It proved that it is not possible to live in a closed environment for long. Q7. What’s the author’s purpose in writing the passage? The author’s purpose is to raise public awareness of environmental protection by pointing out the tiny possibility of our moving to Mars in the future. Read para 5 and answer the question: 1. Would you like to be one of the first people to live on Mars? Why or why not? 2. Which is better, to live on Mars or to solve Earth's problems? Why? No. It is hard to say if the conditions on Mars are safe and proper for human beings to live on it. I think that it is better to try to solve Earth's prblems. On the one hand, Earth is the place where life began, where life has lived for billions of years. On the other hand, it is easier and safer for us to protect and save our planet than to move to another distant planet. Think and share Post-reading Thank you Lavf57.71.100 Codec by Bilibili XCode Worker v4.8.35(fixed_gap:False) Lavf58.20.100 Packed by Bilibili XCoder v2.0.2 Lavf58.12.100 Packed by Bilibili XCoder v2.0.2 Lavf57.71.100 Packed by Bilibili XCoder v2.0.2 $