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Thread: Biology Extended Essay Help

  1. #1 Biology Extended Essay Help 
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    Hey guys I'm doing an IB Biology EE here in the US and was wondering if anyone could help me out. I'm examining two Energy sources and I'm experimenting to see which one would be the most effecient in terms of enhancing photosynthesis for plants. The plant I'm testing is Elodea since they are in water and thus I can easily test the oxygen levels in the water which will show if photosynthesis was happening more or less. Now my control is the Sun obviously but I'm stuck on this second power source. I am trying to relate it to solar energy. I mean a power energy source which meaning I can use a photovoltaic cell or solar panel to make it with. This will be more accessible for me. I only have a month to do this and it's very possible, at least just a first draft. I think this will be a great EE but I just can't seem to find that second one. Does anyone know of a way to create like a greenhouse effect or a solar powered object which enhances sun energy. Thanks in advance!

    The EE is basically like a 4000 word science fair project the setup is exactly like one and I'm very interested in it.


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  3. #2  
    Forum Cosmic Wizard i_feel_tiredsleepy's Avatar
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    I suspect there may be some lightbulbs out there that have higher intensity than sunlight, something like a tanning bulb, no guarantee that won't kill your plants though.

    It's easier to vary wavelengths of light, using coloured filters, to establish optimum wavelengths for a plant.


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    and how i kissed you then
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  4. #3  
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    I already thought of a lightbulb but wouldn't that be like a flaw in my design of the experiment? Solar powered lightbulb?
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  5. #4  
    Forum Cosmic Wizard i_feel_tiredsleepy's Avatar
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    How do you plan on examining photosynthesis without a light source for the plant. Temperature and humidity, while also not being dependent on the power source of where the plants are housed, will have negligible results on the efficiency of photosynthesis (except perhaps at extremes). Moreover, I have no idea how to even manage humidity within a green house.
    "I almost went to bed
    without remembering
    the four white violets
    I put in the button-hole
    of your green sweater

    and how i kissed you then
    and you kissed me
    shy as though I'd
    never been your lover "
    - Leonard Cohen
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  6. #5  
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    Temperature and humidity, while also not being dependent on the power source of where the plants are housed, will have negligible results on the efficiency of photosynthesis

    Yes - this would be very easy to remedy through the use of suitable controls

    :wink:
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  7. #6  
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    So would it make sense to use a lightbulb designed for replicating solar energy, powered by a photovoltaic cell?

    All I need is a light or solar energy which is powered by solar power. That's all I need. Can anyone think of one?
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  8. #7  
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    Discuss what you have experimented. Explain the things that made the plant live. That is the first step you can do in your essay.
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