The shell of chicken eggs are made mostly of calcium carbonate (CaCO3), which which reacts with distilled white vinegar (try placing a raw egg in a glass of vinegar overnight). The shell has over 15,000 tiny little mores that allows air and moisture to pass through, and a protective outer coating to keep out harmful things like dust and bacteria.
We're going to peek inside of an egg and discover the transparent protein membrane (made of the same protein your hair is made up of: keratin) and also peek in the air space that forms when the egg cools and contracts (gets smaller). Can you find the albumen (the egg white)? It's made up of mostly water with about 40 different proteins.
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The chalaze are the thin rope-like strands that anchor the yolk in the center of the egg. The more prominent they are, the fresher the egg you've got. The yolk itself is more protein than water compared with the white. That's where you'll find all the fat, lecithin, and minerals. The exact shade of color of the yolk is going to depend on the hen that actually laid it.
Materials:
- bowl
- chicken egg
- spoon
- toothpick
Here's what you do:
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Download Egg Dissection Lab here for older grades (5-12th) and here for younger grades (K-4).
No, you want to use an unfertilized egg. The white cord that you see is a chalaza. The two chalazae (plural) are rope-like structures made of protein that help the yolk to remain at the center of the egg.
um you said an un fertalized egg did you mean a not developed egg because the one she had was fertil you could see the white spot in the yolk but what is the embilicle cord thing called attached to the yolk.
Yes, leave it on the counter for 2 hours so it can come to room temperature.
For this egg dissection is going to work with an egg in a fridge?