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课件网) Unit 2 Out of this world Project 1. the Sun 2. Mercury / m kj ri/ 3. Venus /'vi n s/ 4. the Earth 5. Mars 6. Jupiter / d u p t (r)/ 7. Saturn / s t n/ 8. Uranus / 'j r n s/ 9. Neptune / neptju n/ Mars is a rather harsh environment no oxygen in its atmosphere very cold radiation the atmospheric pressure in a protected environment with source of oxygen Sample A: Can humans live on Mars B: It’s hard to do it, because Mars is a rather harsh environment. A: Would you please tell me more about it B: First, Mars has essentially no oxygen in its atmosphere. The atmosphere of Mars could not support life. B: That’s terrible. M: Secondly, it is very cold on Mars. A: So we would die of freezing on Mars. B: You are right if unprotected. Thirdly, radiation. A: We need protection against radiation to be healthy and not get cancer. B: There’re many other problems. For example, the atmospheric pressure is not suitable for humans just like when you go deep in the ocean the pressure increases. A: Oh, it’s hopeless! B: However, humans could live in a protected environment with source of oxygen. A: I hear there is currently a mission planned by a private company to send humans to permanently live on Mars! B: Time will tell if they’re successful. Sample Understanding the profile How to live on Mars What problems are mentioned in the profile And how can we solve them Radiation Dust storms We should find permanent shelter that offers long-term protection, such as building a special structure near Mars’ freezing north pole. We could also take advantage of the solar energy or construct nuclear power stations to satisfy our energy needs. Problems Solutions … … Water Food Water mining. Create water with oxygen and hydrogen shipped from the Earth. Grow food using chemicals like carbon, nitrogen, oxygen, hydrogen, etc. What if we lived on the Moon Wouldn’t it be cool to be able to live and work on the Moon Let’s say we do want to live and work on the Moon. But there are two basic needs that we would have to take care of: water and food. What if we lived on the Moon Water is a tricky problem. There’s now some evidence that water ice might be present at both the north and south lunar poles. If so, water mining might be possible. If water isn’t available on the Moon, it must be imported from the Earth. One way to do that would be to ship liquid hydrogen from Earth to the Moon, and then react it with oxygen from the Moon’s soil to create water. As a side-benefit, the hydrogen can react with oxygen in a fuel cell to create electricity as it creates water. What if we lived on the Moon Food is also a problem. The first thought that anyone on the Earth would have is to grow the food on the Moon, using chemicals like carbon, nitrogen, oxygen, hydrogen, potassium, phosphorous, and so on. To grow a ton of wheat, you’ll have to import all the chemicals not readily available on the Moon. Once the first crop is ... ...
