 2010 National Science Experiment 4-H20
This year's National Science Experiment – 4-H20 – is designed to engage youth around the country in asking the question: Why is water quality important and why is it important to understand it now?
(Listed above from left: Monica Frank, a 4-H Alumni, Peter Uzar and Chrissy Uzar.)
Youth begin the experiment through conducting a simple activity to understand how people increase the amount of CO2 building up in the atmosphere. Using a bromothymol blue indicator solution (BMB), youth blow into a BMB/water mixture to demonstrate the concept of CO2 gas and students can visually see how CO2 levels can build-up in water by seeing how the indicator changes colors.
They continue the activity by introducing effervescent tablets into plastic sandwich bags in varying quantities to show how that CO2 expands in the earth’s atmosphere. The bags represent the earth’s ability to capture greenhouse gases. Youth then add the tablets to water to connect back how the BMB shows higher levels of CO2 in the tablet/water mix.
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