L/O/G/O Students try Mars farming Students try Mars farming Shi Yunyu

 According to the title “Students try Mars farming”, what do you think the passage may tell us? Students try farming on Mars.  Can students really go to Mars? Not really. It is an experiment, or a case study, or a research. It is a case study helping students figure out how to grow crops on Mars.

 Is the environment on Mars suitable to grow crops?  How can the students live on Mars?  What do we need to grow crops?  What kind of crops can be grown on Mars?

 Soil: carbon, nitrogen (protein), water turns into gas  24h 40m day-night circle  Sunlight is about 44% as long as on earth.  Enough carbon dioxide(二氧化碳） and water for use  Air pressure is at most 1% that at Earth’s surface  Almost no oxygen(氧气)  Low temperature: -123〫to 0 〫 Mars: a different ecosystem Is the environment on Mars suitable to grow crops?

 Food  House  Breathe ---- Oxygen  Water (ice)  … … How can the students live on Mars?

 Seeds  Tools  Water (ice)  Sunshine  Fertilizer (肥料)  … … What do we need to grow crops?

What kind of crops can be grown?  Feed the students there  Water usage ( 耗水量）  Fertilizer( 肥料 ) usage  Yield ( 产量 )  Time to grow to harvest  Calories content ( 热量含量 )  Protein content ( 蛋白质含量 )  Fat content ( 脂肪含量 )  … …

 Students use a scoring system to select three foods to plant on Mars.  There are 100 students going to Mars to grow crops. Besides the equipment and tools, everyone can just take food with them, which is just enough for 3 months. Otherwise, the spaceship would be overloaded(超载).

Select three crops Water usage Fertilizer usage YieldTime to grow CaloriesProteinFat Corn MediumHigh LowHighLow Rice High Medium Low Wheat LowMediumHigh Medium Low Potatoes MediumHigh Medium Low Peanuts LowHighLowHigh MediumHigh Soy- beans MediumLow HighMedium

When conducting( 实施 ) a case study or a scientific research, we should consider:  Environment on Mars?  Students live?  How to grow?  What to grow?  Conditions(条件)  Conductor(实施者)  Approaches(方式）  Possible results  Solar energy; glass house; …  Ability; survive; …  Spaceship to take tools, seeds...  Proper choice & results Raise questions Analysis( 分析 ) Solutions

 “I am not teaching about growing food on Mars,” Allen said. “I’m teaching about living with choices. I’m teaching about problem solving.”

L/O/G/O Thank You! Thank You!