How are Sounds made?
Through Vibrations
What is Sound?
It is a type of energy
Pluck the string soft, then pluck it hard. What is the difference? Why?
More energy in loud sound, less energy in soft sound
What is noise?
When Sound molecules move randomly
Find 2 sources of loud sound in your house
Mixie, Vacuum Cleaner, Toy
How does a rubberband noise reach our ears?
The rubberband first vibrates and it sets off a chain reaction of air molecules
When you stop the rubberband when it is vibrating, What happens? Why?
Sound stops, cos vibrations stop
Name 2 soft sounds
Fridge, AC, A whisper
Name 2 words that are like sounds?
Boom, Pop,
How does sound move from a bell to your ear?
Sets out a chain reaction of sound molecules from the bell to your ear
which part of our ear vibrates and receives the sound?
Ear Drum
What is air made up of?
Tiny particles called molecules
What is a note?
When the sound particles move in a particular set way or rhythmn, a note is created
Does Sound travel in Space? Give reason
No. Space is vacuum. There are no particles in space
What do you mean by vibration?
When the string vibrates the molecules near it, setting out a series of vibrations, till it reaches your ear.
What do you mean by Sound Sources?
Anything that makes a sound