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Organization of 4H Module
• Brief Introduction and handouts (~30 min)– Module Description– Worksheet- please return at the end of the
module
• Lab section in room 162 (~2.5 h) – Five Groups
• Recap (~15 min)
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4H moduleA Mars Greenhouse
Prepared by: Hemant Gohil, John Truett, Alex Stimpson,Dr. Ray Bucklin and Dr. Melanie Correll
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Mars in the Solar System
http://scienceclass.ning.com/
Earth
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Phoenix Mars Lander: Water on Mars
(Artist conception) Phoenix Mission, University of Arizona
Image credit: NASA/JPL-Caltech/University of Arizona/Texas A&M University
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Atmosphere of Earth and Mars
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http://www.spacegarden.net/documents/Plants%20in%20Space%20Introduction%20Presentation.pdf
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Plant – Water-Gas – Human Interactions
http://www.nasa.gov/images/content/138008main_jsc2005e43267_hi.jpg
Wheeler, R.M. 2004. Horticulture for Mars. Acta Hort: 642 ISHS
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http://www.nasa.gov/images/content/138008main_jsc2005e43267_hi.jpg
PRESSURIZED MARS GREENHOUSE
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PRESSURIZED GROWTH CHAMBER UNDERGROUND
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NASA MARS SURFACE GREENHOUSE DOME
(low pressure)
http://science.ksc.nasa.gov/biomed/marsdome/DOMEPIC4.GIF
http://adamstuart.blogspot.com/2007_05_01_archive.html
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UF Mars Greenhouses
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Activities1. Assembling a Low Pressure Growth Chamber.
2. Uploading of the software program to the computer that monitors sensor outputs.
3. Programming the Temperature sensor – converting °C to °F.
4. Studying the effect of Low Pressure on Gas dynamics in LPGC.
5. Testing a marshmallow/balloon in low pressure to understand Boyle’s Law.
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Activity 1: Assembling a Low Pressure Growth Chamber
COVER
Base12V Power supply
CR10DataloggerO2 Sensor
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PRESSURE SENSOR
OXYGEN SENSOR
CARBON DIOXIDE SENSOR
TEMPERATURE SENSOR
4L
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Activity 2: Uploading of the software program to the computer that monitors sensor outputs.
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Activity 2: Uploading of the software program to the computer that monitors sensor outputs.
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Activity 3. Programming the Temperature sensor
°F = °C*1.8 + 32
Step 1: Collect data in °C
Step 3: Take stored value from Step 2 and add 32
Step 2: Multiply data by 1.8 and then store value
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Activity 4. Studying the effect of Low
Pressure on Gas dynamics in LPGC Highlight Columns for Time vs. Pressure Figure
Sensors
Vacuum Pump
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CLICK THE FIGURE ICONWhile Columns are Highlighted
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Select XY Scatter Plot then finish
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Final Plot: Sketch line in worksheet, repeat for O2% and CO2 ppm, see other groups if your
group doesn’t have a sensor
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Activity 5. Testing a marshmallow and balloon in the LPGC to understand Boyle’s law
Marshmallow Balloon
Boyle’s Law
P1V1 = P2V2
•Balloon test•Marshmallow test (note: use ruler setup to measure height and diameter of marshmallow in the chamber)
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Activity 6. Calculating the photosynthetic rates at Low pressure
• 6 CO2 + 12 H2O C6H12O6 + 6 O2 + 6 H2O
LIGHT
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HAVE FUN and BE SAFE!
• ASSIGN GROUPS #s