Can you hear me?
Sound waves
High's and Low's
There and back again
100
We use this part of the ear to catch sounds.
Outer ear. Pinna.
100
Sound is created by this back and forth motion.
Vibration.
100
This word is used to describe how high or low a sound is.
Pitch.
100
What is faster - light or sound?
Light travels much faster than sound.
200
This is what vibrates inside your ear when sound reaches it.
Ear drum.
200
Name a characteristic of sound wave that is related to the volume.
Amplitude.
200
What vibrates faster, a lower or a higher sound?
High sound is faster. The faster the vibration, the higher the sound is.
200
Sound travels because these bump into one another in the air.
Particles of matter (atoms, molecules).
300
Hair cells transform vibrations into electrical signal. How does this signal come to the brain?
Through auditory nerve.
300
Name two characteristics of sound wave that are related to the sound pitch.
Frequency and wavelength.
300
I will play a note on a xylophone. Play another note that is higher than mine. First, explain how to make the right choice.
The shorter the plate, the faster it vibrates. So, the shorter plates give the higher notes.
300
Could we hear a big explosion in space if we were there? Explain why.
No, we could not. Because sound is a wave that needs particles to travel, and in space there are no particles.
400
Why do you think we have two ears?
To find out the direction and the distance to the sound sourse.
400
Draw a wave of a sound that has LOW pitch and HIGH volume.
Low pitch means longer wavelength, high volume means higher wave peaks and lower troughs.
400
Draw a wave of a sound that has a HIGH pitch
400
Put the objects in correct order depending on the sound speed in them (from the slowest to the fastest): water, air, metal. Explain your answer.
Air - water - metal.
Sound travels faster in solids, slower in liquids and gases.