Friday, August 14, 2015

An Eggy Experiment

For our letter E science activity I knew we had to do another experiment. And, why not throw some more E's in there and make it an egg experiment? I found some fun ideas on Science Sparks, and we decided to go for it. First we gathered our materials.
-Distilled Vinegar
- An Egg
- A glass container big enough to hold the egg
- A measuring cup (optional, I wanted Erik to be able to pour the vinegar without handing him the whole jug)
 Put the egg in the glass and cover it with vinegar. Leave it for several days (I think ours was 5-6 days) while you observe. 
The egg will get air bubbles on the shell when it starts reacting with the vinegar. For us this happened almost right away. We observed the bubbles both visually and by listening to the bubbles pop.
 While we haven't actually sat down and discussed all the steps in the Scientific Method, I still try to get Erik thinking by discussing what we're observing and making some hypotheses. We even get Daddy in on the guessing, just to make it more fun. We made up a chart showing what we thought would happen and taped it to the wall above our egg jar. Dad guessed the shell would go away and the egg would break. Mom guessed it would become see-through. Erik guessed that it would bounce and break.
 I didn't get any pictures of the end result, but it was really neat. The egg shell dissolves (we had to gently rub off the residue with our fingers) and the egg swells up inside the remaining membrane until it's noticeably bigger than it started out.
After making our observations about the end result, we decided to go a step further and go with another idea from Science Sparks. We carefully removed our egg from the vinegar and I let Erik drop it (gently) into the empty kitchen sink. His guess was right. We were able to bounce it a few times before it broke and ran down the drain.

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