lightupscience科学5a课件unit2soundlesson2wherecansoundtravel？

nd ( can / cannot ) travel in space.Р库文档分享РCan sound travel through a solid?РYou needРstringРforkР库文档分享РTie a loop in one end of the string. Tie the other end to a fork.РPut the loop over your finger. Then put your finger into your ear. Let your friend tap the fork.РWhat to doР1Р2Р库文档分享РI (can / cannot) hear the sound of the fork.РSound (can / cannot) travel through solids.РResultРConclusionР库文档分享РCan sound travel through a liquid?РYou needРwaterРplastic bagРradioР库文档分享РPut a radio in a plastic bag.?Seal the bag.РPut the bag under water. Turn on the radio through the bag.РWhat to doР1Р2Р库文档分享РI (can / cannot) hear the sound of the radio.РSound (can / cannot) travel through water.РResultРConclusionР库文档分享РSound can travel through solids, liquids and gases.?Sound cannot travel in space.Р库文档分享