Why does ice float?
An ice cube bobbing in a summer drink — or a winter pond that freezes a lid on top so fish and frogs survive underneath; the iceberg that hides nine-tenths below.
Talk about it
- Guess first: does a cup of ice weigh more or less than the same cup of water?
- Only about a tenth of an ice cube pokes out — where is the rest of it?
- Most solids sink in their own liquid; why do you think water breaks the rule?