Write true or false

7. A sound travel faster in air if it is cold.

8. Higher temperature in molecules creates a medium that allows sound to travel faster.

9. Sound cannot travel through solid.

10. Molecules at higher temperature vibrate faster.

11. Sound can travel through solids, liquids, and gases but not in a vacuum.

12. Repeated echo is known as resonance,

13. The speed of sound in water is two times slower than that in air.

14. If the temperature decreases the speed of sound also decreases.

15. Sound travels faster in space than in water.​