Science fair 2014
Transcript of Science fair 2014
Bacterial selection in a Winogradsky panel:
How would the bacteria in the panel differ in different lights?
The inspiration for this project was the panels at the Exploratorium
Question:
I hypothesize that certain lights such as fluorescent lights and LEDs will positively
effect the organisms while lights like Black lights may kill the organisms.
Hypothesis:
Will different kinds of light effect the growth of organisms from Lake Merced?
This took a long time
After an hour and a half of pouring and listening to “Serbia Strong” as motivation.
We need a variety of lights
1 Blacklight: Watts: 13 Volts: 120 Lumens: not listed Wavelength: 100-400
2 LED: Watts: 7 Volts: 120 Lumens: 450 Wavelength: 840-9503 Halogen: Watts: 40 Volts: not listed Lumens: 600 Wavelength: 190-4004 Incandescent: Watts: 40 Volts: 120 Lumens: not listed Wavelength: 6505 Florescent: Watts: 13 Volts: 120 Lumens: 825 Wavelength: 280-315
Florescent
The light caused the bacteria to grow in a pattern similar to what you would see in deep space.
So why did we get different colors growing under each light?
LED supports the blue green range Fluorescent supports a range of growth Blacklight selects for beta-carotene Halogen selects for beta-carotene (barely)Incandescent supports only in the yellow red range
Conclusion:While I was correct in thinking that fluorescent lights and LEDs would effect the growth of the organisms, it turns out that I was wrong when I said that the Black light may kill the life inside. The Black light was able to support dark forms of life.
What I would change:If I was able to change this experiment, I would:1. Find out a way to eliminate heat from the lights.2. Create several boards at once and compare results3. Incorporate natural sunlight into the project.