All experiments
Science · Ages 5+
What Floats?
Guess before you drop it in!
Object 1 of 8
Apple — float or sink?
What is this experiment about?
Look at the object, make your guess — float or sink — then drop it in and see what really happens.
Questions kids ask
- Why do some heavy things float?
- It depends on density, not just weight. A big boat floats because its shape displaces enough water, even though it's heavy.
- Why does a stone sink?
- A stone is denser than water, meaning it packs more mass into the same space, so it sinks.
- Does shape matter for floating?
- Yes! The same material can float or sink depending on its shape — a flat sheet of foil floats, but crumple it tightly and it may sink.
