1、Unit 2 Out of this worldProject1.The sun 2. Mercury /mkjur/3. Venus /vins/4. Earth5. Mars6. Jupiter /dupt/ 7. Saturn /stn/ 8. Uranus / jrns/ 9. Neptune /neptjun/ no oxygen in its atmosphere very cold radiation the atmospheric pressure in a protected environment in a heated capsule with source of oxy
2、genHarvest oxygen in the soil Collect the buried ice at the south pole of the moon. Create water with oxygen and hydrogen shipped from the Earth. Manufacture solar cells Generate electricity from the reaction of hydrogen and oxygen Use nuclear powerGrow food using chemicals like carbon, nitrogen oxy
3、gen, hydrogen, etc.Wouldnt it be cool to be able to live, vacation and work on the moon? Lets say we do want to colonize the moon. But there are some basic needs that the moon colonists would have to take care of: breathable air, water, power and food. Obtaining breathable air, in the form of oxygen
4、, is fairly easy on the moon. The soil on the moon contains oxygen, which can be harvested using heat and electricity.Water is trickier. Theres now some evidence that there may be water, in the form of buried ice that has collected at the south pole of the moon. If so, water mining might be possible
5、.If water isnt available on the moon, it must be imported from Earth. One way to do that would be to ship liquid hydrogen from the earth to the moon, and then react it with oxygen from the moons soil to create water. As a side-benefit, the hydrogen can react with oxygen in a fuel cell to create elec
6、tricity as it creates water.Power on the moon is an interesting challenge. It would probably be possible to manufacture solar cells on the moon, but sunlight is available only part of the time. As mentioned previously, hydrogen and oxygen can react in a fuel cell to create electricity. Nuclear power
7、 is another possibility, using uranium mined on the moon.Food is also a problem. The first thought that anyone on Earth would have is, “Grow the food on the moon” using chemicals like carbon, nitrogen oxygen, hydrogen, potassium, phosphorous, and so on. To grow a ton of wheat, youll have to import a
8、ll the chemicals not readily available on the moon. Once the first crop is in, and as long as the colonys population is stable, then the chemicals can be reused in a natural cycle. The plant grows, a person eats it, and the person excretes it as solid waste, liquid waste and carbon dioxide in the br
9、eath. These waste products then nourish the next batch of plants. Definitions1. n. fine dry powder consisting of particles of earth, dirt, etc.2. v. remove dust from (sth.) by wipingVocabulary web 1. dustdusty adj. dustbin n. duster n.; dust n.Definitions1) n. condition of being protected, kept safe
10、, etc.2) n. structure built to give protection3) n. building providing refuge, esp. for homeless people4) v. protect sb./sth., give shelter to sb./sth.Vocabulary web 2. shelter sheltered adj. shelter v. Definitions1) adj. going on all the time; happening again and again2) adj. unchanging; fixed3) ad
11、j. firm; faithfulVocabulary web 1. constantconstancy n. constantly adv. constant adj. Definitions1) adj. going on all the time; happening again and again2) adj. unchanging; fixed3) adj. firm; faithfulVocabulary web 3. constantconstancy n.constant adj.constantly adv. Definitionsn. the use of money to
12、 get a profit or to make a business activity successful, or the money that is usedVocabulary web 4. investmentinvest v. invent v.; investment; n. invite v. 1. Investment1. _ in hospitals is needed now to match the future needs of the country.2. The crisis struck the core of the global system, leavin
13、g no country _ from its consequences.2. sheltered3. dusty4. She thought _ about her family; she might never know what had become of them.3. History is much more than the study of _ old objects and events long past5. Before bricks _, people built their houses of wood.4. constantly5. were invented1. Watch the micro lesson: Six steps for solving a problem. (Optional)2. Surf the Internet and find more interesting information about how to live beyond the Earth.
