Look at this toy boat and this stone. If we pop them in water, which one will stay on top? Which one will go down?
Hands up for your guess!
Float means it stays on top.
Sink means it goes down.
We will guess first, then watch.
Five things are on the board: a cork, a spoon, a stone, a sponge and a toy boat.
For each one, we say float or sink before anything goes in the water. Our guesses stay on the screen.
Sleeves up! At the water tray we try our things one at a time.
Put it in gently. Watch. Does it stay on top or go down?
Look back at our board guesses. What did the water really do?
Which things stayed on top? Which went down?
You're previewing this lesson. Get full access to this lesson and hundreds more — each one ready to teach, with interactive activities, printable resources and pupil progress tracking built in.