true or false

1. sound is produced through vibrations
2. sound waves travel fastest through solids
3. sound waves travel at a different speed through different media
4. sound waves travel a little faster though air than water
5. sound waves faster in liquid than in solid
6. conduction of heat happens in solid materials
7. radiant energy travels as a wave though solid materials
8. comvection of heat happens in gases and in liquid
9. all solid subtance is in a good conductor
10. insulators are solid materials that do not allow the heat to transfer