In this experiment everyone stood in a line facing away from the source of the sound.
When a whistle is blown the people in the line put up their hands.
What Happened
Watch to see what happens
What is Happening
The people hear the sound at different times and so put there hands up at different times.
What does this MEAN?
Sound takes time to travel to your ears.
Take a look at this video of an explosion.
Look closely. What do you see?
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What did you learn during this investigation?
What surprised you?
What new thinking or ideas did you have?
What was your favourite experiment?
What did you find hard?