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How to design a science fair project from scratch: day 3

Posted by on October 27, 2013

Doing a “trial run” might seem inefficient, but I assure you – it will help discover any issues or problems and will help pinpoint concentrations, volumes, times, etc. that need to be worked out if you are designing your own project.

Mistake #1: I put the 2 jars in a dark area of my kitchen; for me this was behind my breadmaker… However – out of sight = out of mind because I forgot to dump out the water after 8 hours. Anyway – here is what the beans now look like:

mung beans 2 001

Adding to procedure, we would want to drain the water out of the jar through the cheese cloth top. Fill the jar with tap water (through the cheese cloth) and rinse 3 times (both the control and the test get rinsed with clean water).

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Interestingly, the volume of beans seems to be about the same in each jar, but I can see signs of sprouting in the control jar (small white rings in the center of the swollen green beans) and not in the test jar, suggesting that the lower pH might interfere with sprouting.

See the control:

CONTROL

CONTROL

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And the test beans exposed to a low pH environment (i.e. vinegar)

TEST (low pH)

TEST (low pH)

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Thinking about what I can measure/observe: Volume of beans, signs of sprouting, color, etc. I will want to include all of these on a data sheet that I make for my real run. I will also want to have a camera on hand to document the progress and get photos for my backboard.

Today: Rinse the beans 3x in the evening

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