Year 3 become Scientists!
Year 3 have really got into the swing of being Shakespeare scientists this half term. They have made bouncy eggs! This sounds like the eggs should bounce… but they don’t! They pop! Year 3 decided that they should have used boiled eggs instead of raw ones!
Here’s how you can try the egg-speriment at home!
What you need:
- One egg (boiled or raw)
- White vinegar
- Large bowl
- Place the egg in the bowl.
- Completely cover the boiled egg with vinegar.
- After three days, remove the egg from the jar
- Gently rinse the shell off the egg with tap water.
How does the egg feel? Rubbery? Try bouncing the egg on a hard surface. Get your friends to have a go. Who can get the egg to bounce highest?
You can make a coloured bouncy egg by adding food colouring to the vinegar.
How does it work?
Egg shell is made of calcium carbonate. Vinegar is an acid - acetic acid. When calcium carbonate is exposed to an acid it reacts. The calcium carbonate egg shell dissolves, but the membrane inside the shell, surrounding the egg, remains intact. This makes the egg feel rubbery.