By Tom Robinson
ISBN-10: 160550596X
ISBN-13: 9781605505961
Technology hasn't ever been so easy-or loads enjoyable! With The every thing childrens technological know-how Experiments ebook, all you must do is assemble a couple of home items and you'll recreate dozens of spectacular, kid-tested technological know-how experiments. highschool technological know-how instructor Tom Robinson indicates you ways to extend your medical horizons-from biology to chemistry to physics to outer area. you will find solutions to questions like: Is it Read more...
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Extra info for The everything kids' science experiments book : boil ice, float water, measure gravity- challenge the world around you!
Example text
When animals (and humans) use camouflage, they are taking advantage of the fact that when their colors match those around them (green frogs in grass, brown lizards on a tree branch) predators don’t see any contrast, and the animals are somewhat hidden. If you placed a brown frog in the grass or a green lizard on a tree branch, that animal would stand out and would not be protected. FOLLOW-UP If you know someone who owns sunglasses called Blue Blockers, ask if you can try them on. When you do, what colors do you see most strongly?
Let it sit for a few days. You should return to find that the eggshell has disappeared and your raw egg has become see-through. You may need to rub the surface to remove the last parts of the shell. WHAT’S HAPPENING The acid in vinegar slowly ate away at the eggshell until none of it remained. When you returned to find the see-through egg, you were really seeing the thin membrane that holds the egg inside the shell. You may have noticed quite a bit of bubbling during the “peeling” process. Eggshells are made of calcium carbonate, which reacts with vinegar (an acid) and makes calcium acetate, carbon dioxide (the bubbles you see), and water.
Other samples should have turned the indicator greenish blue. Those are the bases. Now that you know what to look for, can you find other acids and bases in your kitchen? CAUTION: Some acids are very dangerous to humans. Be careful not to get any of the samples on your skin, and never try to eat or drink things that you are experimenting with. …” — Isaac Asimov, author and biochemist Amazing Bubbles Can you find your way from START to END without bursting any of the bubbles? TRY THIS RAW EGG PEELER Now that you know how to find acids, you are ready to see what an acid can do to a common kitchen item.