Bill Nye- Sound notes

• Sound is tiny vibrations in the air
• Oscilloscope- makes sound waves visible
• The ear is like a funnel that helps sound go into the eardrums
• Sound travels faster through metal and brick faster than through air
• Sound travels 18 times faster through metal than air
• An echo happens when sound bounces off something
• When sound enters the ear canal it becomes smaller
• Higher frequency = Higher pitch
• Lower frequency = Lower pitch