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Archive for June 11th, 2009

Grandma is in our thoughts all the time, but especially this week. Although Satori doesn’t know all the details, we all hope tomorrow goes smoothly! We will try to make it back to Wisconsin soon this summer and hang out with you and Grandpa.

Here’s a picture Satori drew of her and her grandma. She added the rooms of our house, as well as her butterfly pets flying around the house. (Click for larger image.)

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We love you Grandma!!!

Our “Spores All Around” experiment was to demonstrate how the early plants reproduced with spores. As the first plants like mosses lived on land, they reproduced using spores. Our first moss and ferns were able to easily release spores to disperse in the wind, and still do today.

In this experiment, we are going to grow our own mold from these tiny spores that float in the air. We took a piece of bread, moistened it with a bit of water, then set it in a covered container. Satori watched to see nothing else was added. I told her that some spores will have set down in the moment we placed the bread in the container and shut the lid.

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It took awhile, but two weeks later, we can see our fuzzy blue mold. I expected this to take place sooner, but we live in a dry, high altitude place, and it happened to be very cold this month. Perhaps all some of these factors slowed our mold growth.

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In a few days, we will not open this container, but throw it all away.

As we learned how some amphibians evolved into reptiles, one of the important changes was their eggs. Amphibians lay soft, jelly-like masses of small eggs, and must lay them in the water. In order to succeed as land animals and be able to be away from the water, reptiles started laying hard-shelled, amniotic eggs on land. The hard outer shell and layers of fluid protected and nourished the embryos.

The Naked Egg Experiment demonstrated the differences of the eggs as we took a raw, hard-shelled egg, and dissolved the shell to show a shell-less egg, somewhat like the amphibian eggs.

Naked Egg supplies needed

Naked Egg supplies needed

Supplies Needed

  • Raw Egg with shell
  • White Vinegar
  • Container
  • Spoon to keep egg submerged

Place the egg in the glass, and pour the vinegar over to submerge completely. Use the spoon to lay on top of the egg to keep it submerged.

You’ll notice bubbles forming on the shell right away. The eggshell is made up of calcium carbonate. The vinegar reacts with the calcium carbonate by dissolving it and breaking it into calcium and carbonate parts. The carbonate forms the bubbles.

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The next day, dump out the old vinegar and put in new. Wait a week…

After the week is up, pour out the vinegar and carefully pick up your translucent, shell-less egg!

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Have your child touch the egg, and very carefully squish it down. I’d do this over a sink! 🙂

squishy shell-less egg

squishy shell-less egg

This is a great science experiment, google “naked egg” to learn more, but for our purposes this month, we just wanted to see the egg-less shell.