Explanation of Squiddy
As you observed, Squiddy dived in the bottle when you squeezed it, and returned to the top when you let go of the bottle.
Why does this happen?
Inside Squiddy’s body there is a container with air. When you squeeze the bottle, the pressure increases, and the air is compressed. The sides of the container will bulge inwards creating a smaller volume, whilst the weight stays the same. This causes a higher mass density. When it is higher than the mass density of water, Squiddy will sink to the bottom giving the illusion of it diving.
When you let go of the bottle, the pressure will go back to normal (1 atm) and Squiddy will float back up to the top of the bottle.
Extra challenge?
What law does Squiddy demonstrate? To help you out we have listed a few alternatives to choose from:
What law does Squiddy demonstrate? To help you out we have listed a few alternatives to choose from:
- Pythagoras’ law
- Arcimedes’ law
- Murphy’s law
- Newton’s law