Sink or swim
This experiment demonstrates how a piece of paper floats in one type of liquid but sinks in another.
00:45
Physics
On-screen labels
Here is what you need, water, two glasses, two pieces of paper, a spoon, washing-up liquid, Fill the two glasses with water, Pour some washing-up liquid into one of the glasses, Stir it up, See what happens when you drop a piece of paper into each glass, What happened?, Why did one paper sink while the other one floated?