Saturday, March 26, 2011

Back to it!

Cyan's first science experiment in a few weeks. It was called "Sweet Leaves" from Biology for Every Kid by Janice VanCleave.

Cyan wrote up the lab notes and then asked me if she could do 'salty leaves' too. Of course I said "let's try it!" and we put cilantro leaves in salty, sweet, and unflavored water. The next morning we woke up and the salty one (the one in the middle) had developed TONS of bubbles! The other two had a regular amount of bubbles for tap water.

The sweet and salty water produced both sweet AND salty leaves (although the sugar was much more distinct in the flavor and we got to talk about how plants use sugar and not salt and therefore the plant would actually suck the sugar water up into it faster than the salty water, etc) but the bubbles were the talk of the experiment. Now she is looking for why salty water would produce so many more air bubbles at room temperature than the others. Esp the sugar water. I was thinking it was the molecules of salt that did it, but then, wouldn't sugar do something similar? Science questions in the making. ;)


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