What is sound?

Sound is...

• a beautiful thing

• a wave or vibration

• a kind of music

• a musical instrument

The sound travels through...

• two states of matter

• four states of matter

• three states of matter

• five states of matter

The three states of matter are...

• solid, liquid and wood

• solid, metal and gas

• solid, liquid and light

• solid, liquid and gas

How does the sound travel?

• by the vibrations of your hands

• by the vibrations in the molecules

• by car

• by plane

Sound doesn´t travel through vaccum because...

• is very lazy

• there are no molecules to vibrate

• molecules are very small

• is far away from the Earth

Frequency is...

• beautiful country

• an important measure of sound

• the name of the sound

• a musical instrument

The human ear is capable of detecting frequencies between...

• 1hz to 2 hz

• 2hz to 20 hz

• 20hz to 20.000hz

• 20.000hz to 100.000hz

The loudness of sound is measured in...

• volume

• tone

• pitch

• frequency

To quantify volume we use...

• frequency

• a song

• a speaker

• decibels

Any sound with the frequency below 20Hz is called...

• wave

• vibration

• infrasound

• ultrasound