Sounds Waves

The trough is the 

• highest point of a wave
• lowest point of a wave
• the height of a wave

The crest is the 

• lowest point of a wave
• highest point of a wave
• best toothpaste ever

Compression is when molecules are all bunched up.

• true
• false

Rarefaction is when molecules are all bunched up.

• true
• false

Solids are denser than liquids

• true
• false

Air is a gas.

• true
• false

Sound is made when 

• molecules move closer together
• molecules move away from each other
• something vibrates

Loudness is affected by

• vibrations
• amplitude

Loudness is measured in 

• hertz
• decibels
• inches
• cochlea

A wavelength can be measured from

• crest to crest
• trough to trough
• All of the above