Science for Kids/Science

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Question
Hi. I was wonerin' if you could give a easy experiment that proves that sound travels faster in a solid than in a liquide or gass...  
many thanks

Answer
If you have fancy measurement equipment, you can glue microphones onto a stick of wood and a stick of metal.  Whack them with a hammer and connect your measurement equipment.

Without fancy equipment, here are some ideas

http://www.education.com/science-fair/article/sound-travel/

If you live near a railroad track, you can go to the track with a friend and a pair of binoculars.  Have the friend stand about 1/2 km down the track and hit the track with a hammer.  You will have your hand on the rail and will feel the impulse if the tracks are welded.  You will also see through the binoculars when he hits the rail.  

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Sue Kayton

Expertise

I can answer almost any student science question! I especially like ones involving silkworms, spacecraft and computers.

Experience

MIT graduate. Have worked as an engineer and taught science for 28 years.

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