sound

Question 1

sound waves

Answer 1

caused by vibrated objects.

Question 2

vibrations

Answer 2

passed through surrounding medium as series of compressions and rarefactions.
When travels through solid, causes particle to vibrate.
No all can be transferred.

Question 3

sound travels at different speeds

Answer 3

travel fast in liquids, then they do in gases, faster in solids then they do in liquids.
Frequency of sound dosent change, when passes through medium. Wavelength gets longer when speeds up, shorter when slow.
Sound waves refract when enter different media.