And a clear jar
Submerge your boiled egg in vinegar. And watch and record what happens for 5 days.
These students were drawing what they saw.
This guy was pointing at all the bubbles on the second day.
On the fifth day we pulled the egg out of the jar and washed it off. The shell was completely gone and the egg felt rubbery. The kiddos thought that was great!
Then we put our own science board together.