Unit 6 Developing ideas 课件-2022-2023学年高中英语外研版（2019）选择性必修第二册

Plan B: Life on Mars? Work in pairs. Complete the quiz and find out how much you know about Mars. Try to guess if you are not sure of the answers. 1. a 2. a 3. c 4. b Activity 2 Read the passage and find out why humans might live on Mars. Because Mars is relatively close to Earth and has an environment less hostile than that of other planets. Plan B: Life on Mars? Mind map Scientists are preparing Plan B for earth due to the risks. The reason why Mars is fit for human habitation. The attempts to explore Mars. The challenges and progress in trying to live on Mars. We need to take care of our own planet. nuclear missiles, environmental problems, disasters fascination? unmanned spacecraft in the 1960s, manned missions requirements, months, unable to return Biosphere 2 experiment, growing a variety of plants Choose the magazine in which you would most likely find the passage and give your reasons. 1 The Traveller 2 All About Space 3 Environmental Concerns 4 Biology for Fun Activity 4 Choose 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 risk to life on Earth used to be nuclear missiles. One day, humans will have to go and live on another planet. Our Plan A includes developing renewable energy resources. The Biosphere 2 experiment ended in failure. In _____ 1960s and 1970s, the greatest fear was _____ the human race, and possibly all _________ (advance) life forms on the planet, could ____________(被毁灭) by nuclear missiles, just at the push of a button. Today, however, environmental problems have taken over as the greatest risk ____ life on Earth. Scientists are thinking of ways to _____(low) this risk, such as replacing coal and oil ____ forms of renewable energy. But they are also ——___________________(做最坏的打算): what can we do if the ________(terrify) scenes in films such as The Day After Tomorrow happen in real life?What is our Plan B