Embryology looks inside eggs to see how embryos become chicks.

Peek inside a shell-less (squishy) egg to see inside the first stage of a chicken life cycle.

Hypothesis: Removing an egg’s hard calcium shell reveals a layer of soft squishy membranes.

1. Put egg gently in clear container with lid
2. Label with name, date and time
3. Cover egg with white vinegar
4. Wait 24 hours
5. Pour out vinegar
6. Cover egg again with white vinegar
7. Wait 24 hours
8. Check egg (Is it shell-less and squishy yet? If not, let the
reaction will take a bit longer)
9. Use a flashlight (or your phone!) to peek inside at the
egg yolk - the start of the chicken life cycle

Bonus Questions

Are these squishy membranes permeable? Try putting your squishy egg in one of these:

1. Water - wait 1 day. What happens?
2. Corn syrup - wait 1 day. What happens?
3. Colored water - wait 1 day. What happens?