![]() Once the egg shell dissolves, the egg expands slightly because the membrane is semi-permeable. When you leave the egg in vinegar, the acetic acid in the vinegar breaks down the calcium carbonate shell, producing the tiny carbon dioxide gas bubbles you see. But since this bouncy egg experiment is so simple to set up, it took just a few minutes to get a new bouncy egg started again. Q was pretty sad he popped all three of his eggs. You can see the yolk is still intact and the membrane that helped the rubbery egg bounce is laying next to the yolk. He discovered really quickly that the eggs will break if thrown hard enough! The yellow highlighter, which we thought wouldn’t work when it turned clear, glowed a bright green.Īfter squishing and squeezing each egg, Q couldn’t wait to bounce them. We were surprised that the pink and orange highlighters didn’t make the eggs glow. I brought out the black light to see how the highlighter affected the egg. I rinsed the other eggs under the sink and passed them to Q for some bouncing. So, I cracked an egg on a plate and showed him that the membrane is normally stuck right on the inside of the shell. Q was really curious about the egg’s membrane and where it was located in a raw egg. He gently rubbed the shell with his fingers to reveal the membrane below. Two days later, we checked on our eggs and found that the shells had disintegrated. We could see bubbles forming on the surface of the egg almost immediately, but we had to wait a couple of days to see the real results. Now that the bouncy egg experiment was underway, all we had to do was wait. The pink and orange solutions were very bright, but the solution with the yellow highlighter turned almost clear when the vinegar was added. Then, we covered them with white vinegar. Next, my 3 year-old, Q, very carefully added a raw egg to each of the glasses. The easiest way was to use our fingers, so be prepared for a little mess. To start, we took the polyester cylinder out of the highlighter and squeezed it to extract as much of the ink as we could. Making a glowing bouncy egg is surprisingly simple – the hardest part is having to wait. An egg (one for each highlighter color). ![]()
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