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GrowingfoodonMars

By Cindy Rose,2015-04-02 21:15
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GrowingfoodonMars

    Growing food on Mars

    GROWING plants on Earth is hard enough, but can you imagine trying to grow them on Mars?

     A British-led group is planning to do just that, sending lettuce to the Red Planet as soon as 2018. It would be part of the Mars One mission to start a human settlement (定居点) there in 2025, according to the Daily Mail.

     On Mars, there are temperatures that drop to -90 C at night, large dust storms, and wind speeds that can reach 60 mph (about 30 meters per second). It never rains on Mars because the planet has a thin atmosphere and lacks a magnetic shield (护盾) like the one that covers Earth. But the project, run at the University of Southampton in the UK, would put the lettuce in a greenhouse to protect it.

     Project leader Suzanna Lucarotti said: “To live on other planets we need to grow food there. No one has ever actually done this and we want to be the first.” The group would be “bringing the first complex life to another planet”.

     For the project, called Lettuce On Mars, the greenhouse would be

    launched from Earth with lettuce seeds, water, nutrients (营养物质), and an

    atmosphere. On the way to Mars, it would have no power, and the lettuce seeds would be frozen.

     Following a safe landing, the Mars One lander would start to give power and heat to keep a temperature between 21 C and 24 C.

     Carbon dioxide, which all plants need, would be taken from the atmosphere of Mars and put into the greenhouse.

     The lettuce would then be grown without soil, and would be sprayed (喷洒)

    with water and nutrients.

     If the experiment goes ahead, it will be the latest amazing step toward plants living on Mars and in space.

     The idea comes after researchers sent plants to the International Space Station in 2010 and found that they didn’t need gravity to grow. They grew away

    from their seeds to look for nutrients and water in the same way they would on Earth, according to National Geographic.

     So it looks like we can take plants with us when we go into space. What would you like to grow on Mars?

    Before Class(Write down the words that are strange to you.)

    1

I. Warming up

    1. Can you guess which planet this is?

    How can you tell?

    2. Do you believe humans will live on Mars one day?

    Can you recognize what this is?

    What do you think it has to do with Mars?

II. Fast reading

    Are the statements below true or false? If false, correct them. 1. A British-led group is planning to plant lettuce on Mars before 2018.( ) 2. On Mars the wind blows hard, and it often rains heavily.( ) 3. The British-led group would be the first to send plants to the International Space Station.( )

    4. The greenhouse would be launched from Earth with lettuce seeds, water, nutrients, and carbon dioxide. ( )

    5. On the way to Mars, it would have no power, and the lettuce seeds would be frozen.( )

    III Detailed reading. Choose the best answer:

    1. What is the article mainly about?

    A. A recent technical breakthrough in space travel.

    B. An inspiring plan to grow plants on Mars.

    C. A grand mission to build human settlements on Mars.

    D. A detailed introduction to the harsh environment on Mars. 2. According to the article, a great challenge the #LettuceOnMars project faces is that ______.

    A. plants need gravity to grow in space and on Mars

    B. there is too much carbon dioxide in Mars’ atmosphere

    C. it is impossible for plants to survive on their own in Mars’ environment

    D. scientists are still finding ways to send the lettuce seeds through space 3. Which of the following procedures for the #LettuceOnMars project are correct? a. Seeds, water, nutrients and an atmosphere are put into a greenhouse. b. The lettuce seeds are frozen during the space trip.

    c. The greenhouse is heated to a temperature above 24oC.

    d. Carbon dioxide is taken from Mars’ atmosphere.

    e. Water and nutrients are sprayed on soil to help lettuce grow. A. acd B. abd C. ade D. bcd

    4. The author of the article ______ the #LettuceOnMars project. A. is doubtful of B. is optimistic about

    C. is strongly against D. is uninterested in

    IV. Discussion

    If you were going to settle on Mars one day, what would you like to grow? Give your reasons.

    2

IV. Language study

    1. A British-led group is planning to do just that, sending lettuce to the Red Planet as soon as 2018.

(1) 飞机失事;导致200多人丧生。

     (2) 徐若瑄 ;周杰伦的前女友;收到邮件;邀请她去参加婚礼。

2. But the project, run at the University of Southampton, would put the lettuce

    in a greenhouse to protect it.

    始建于1911年的清华大学已有100多年的历史。

名词后置定语表被动时有三种形式?

    done 表完成被动

    to be done 表将来

    being done 表进行

     construct正确形式填空。

    The building _________ now is going to be our library when it’s finished.

    The building _________ last year is now our library. The building _________ next year is going to be our library.

3. Carbon dioxide, which all plants need, would be taken from the

    atmosphere of Mars and put into the greenhouse. take in: fool/trick sb

    take up: begin a sport or a hobby

    take after: be similar to or look like

    take off: depart or leave the ground

    take over: take control of

    take away: carry sth away

    take from: absorb sth from

    take down: write down

    Fill in blanks with the proper words.

    1: When his father retires, he's planning to take _____ his factory in Beijing.

    2: Our plane took ____ two hours late!

    3: Why do so many men take ____ golf when they retire? 4: Roberto gets angry a lot. He takes _____ his father. 5: Please take ____ notes carefully in class. 6. I was completely taken ____ when he told me he was working late at the

    office.

    3

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