Different types of eggs
This is a simple eggs science project. Check out different kinds of eggs and you’ll see the difference between fish eggs, which are soft and have to be in the water to survive, and the eggs of land animals, which are hard so they can survive on dry land.
Where can I get fish eggs?
It’s pretty easy to get fish eggs: they sell them in grocery stores as caviar or fish roe. Fish lay eggs in the water, so they don’t need to hold water around them. They can get their food right from the water.
Where can I get chicken eggs?
And you probably have chicken eggs in your house. That’s all you need to see the difference between them. Chickens lay eggs on land, so their eggs have to hold water for the baby to develop in, and food for it to eat.
Now break open a chicken egg. The yellow part would be food for the baby chick, if the egg was fertilized (chicken eggs you buy in the store are not fertilized; no sperm came near them).
The yellow part – the yolk – has a lot of protein and fat to feed the baby chicken. The clear part that turns white when you cook an egg is mostly there to cushion the baby chick, but it’s also food for the chick to eat.