WE MADE A “VOLCANO” AND STOOD ON EGGS!
The second installment of PHYSICS IS PHUN took place on Wednesday, October 15. At that time we made a “volcano” by putting baking soda in a bottle, building a mountain of sand around the bottle to make the volcano, and pouring vinegar into the bottle. The reaction of the baking soda and vinegar resulted in a fizzy mixture which “erupted” and created “lava” of foam which ran down the mountain. We ended up with a spectacular mess.
We then observed the reaction between baking soda and vinegar (watching it fizz). We also put a couple of drops of chemical indicator to the mixture and watched the color change from blue to yellow as the reaction took place.
We found some interesting, fun and adventurous science projects on the internet that we thought we could also try. The one we chose first was standing on eggs without breaking them. It was discussed that eggs are similar in shape to a three-dimensional arch, one of the strongest architectural forms. If you hold an egg in your hand and squeeze it on the top and the bottom, the egg won’t break because you are adding pressure to the ends which are the strongest parts of the egg. The curved form of the shell distributes pressure evenly all over the shell rather than concentrating it at any one point thus giving it the strength to not crack! To prove that the architectural design of the egg allows it to have resistance to breakage; we passed a raw egg among the residents and asked them to crush the egg by squeezing it in their hand. We covered the residents with plastic in case our theory didn’t pan out but as the pictures show……the egg didn’t break despite the efforts of the squeezers! To prove our theory further we had 18 raw eggs in a carton and Molly H. and Susan A. proved you could actually stand on these eggs without them breaking as long as you properly positioned your foot on the eggs to evenly distribute your weight evenly across the top of the eggs.
In summary we can say that it’s always fun to continue learning and this learning can be in a fun and interactive way!