How sound travels
What is a vibration?
When something moves back and forth very rapidly (sometimes so quickly that it cannot be seen by the human eye)
Name an animal that can hear a wider range of sounds than a human?
Elephant, bat, shark, dog
How does amplitude affect a sound?
The greater the amplitude the louder the sound
Does a sound wave get bigger or smaller when it enters the ear?
Smaller
True or False: Sound is a type of energy?
True
What is it called when sound travels through the air?
A sound wave
What adaptions help an elephant hear better than a human?
Large, funnel shaped ears
A high pitched sound is created by greater or fewer sound waves over a set time?
greater
What is the membrane in the ear that starts to vibrate called?
Ear Drum
What unit do we measure sound in?
Decibels
What does sound travel through fastest? A solid, liquid or gas?
Solid
From how far away can a shark hear low pitched sounds?
Two football fields
What is frequency?
The number of sound waves that happen in a set time. This effects the pitch of the sound
What is the long, tube-shaped passage called that sound travels down once it enters your ear?
Ear canal
How can sound hurt or damage our ears?
Prolonged exposure to loud sounds can cause pain or a ringing in the ear. Loud sounds can even cause the ear drum to perforate (make a small hole in it).
What is it called when sound waves bounce off an object and travel back towards the original source?
Echo
How many ear canals does a shark's ear have?
3
Regular patterns in sound waves produce what type of sound?
A note
Which animal can make itself temporarily deaf?
bat
List reasons how sound helps us in our everyday life.
Communication, Learning, Safety, etc
In our coat hanger experiment, why did the sound change when we listened to it through the string and our fingers?
The molecules are closer together in a solid. The sound is able to travel more effectively but the waves slow as they pass through so many molecules causing the pitch to get lower
What is the process that bats use to find prey in dark locations using sound called?
Echolocation
What is the pressure or amount of force that a sound wave has as it travels through a solid, liquid or gas called?
Amplitude
What is the sea-shell shaped part of the inner ear called?
Cochlea
Explain how sound is produced and how it travels to our brains.
Vibrations make sound waves which ripple through the air molecules. These waves get smaller as they enter your ear and travel down the ear canal. The vibrating air molecules cause your ear drum to vibrate and your brain turns these electrical signals into sound.