Light and Sound Expeniment

This afternoon Room 5 and L.S.1 went to the reserve and did an experiment. We needed to put our hands up when we heard the clapper. We made a long line beside the water. Ms Kirkpatrick was at one end. When she clapped the the sound travelled down the line. People put their hands up in wave. We saw the clapper before we heard the sound because light travels faster than sound