What is sound?
The Magic School Bus - In the Haunted House
Insulators & Conductors
Hearing, Noise, and Noise Pollution
This and That
100
What is natural sound?
- Sounds that are heard from nature
100
What causes sound?
When an object vibrates it causes the air around it to move back and forth quickly creating sound waves
100
What is another name for objects or materials that muffle or mute sound and does not let sound pass through easily.
- insulator
100
Name three factors that cause deafness.
- illnesses, accidents, being passed on through families, and noise pollution
100
What is frequency?
- the speed at which an object vibrates - fast/slow
200
What is artificial sound?
- Sounds that are made by humans and are not made by nature
200
Describe the vibration of a high pitched sound
The vibration causes many waves that are closer together
200
Another name for objects/materials that allow sound to pass through it easily.
- conductor
200
Name 5 devices or ways that help deaf people to hear and communicate
Hearing aids, cochlear implants, radio aids, lip-reading, sign language, flashing doorbell/telephone/smoke detector, vibrating alarm clock, hearing dog
200
What sound does a string on a guitar make if it is shortened and why?
The sound is higher if the string is shortened because the string vibrates faster and more frequently.
300
Name 3 purposes for how humans and animals use sound.
- enjoyment, warning, communication, annoyance, navigation
300
Describe the vibrations of low pitched sounds.
The vibrations cause fewer waves that are farther apart
300
Sound waves travel slowest in this because the molecules are farther apart
- gases example: air
300
Sounds that are not liked and are harmful to humans and animals
- noise pollution
300
True or false. All deaf people can read lips
False
400
Name 3 groups/families for categorizing instruments.
- wind, percussion and string
400
What is an echo?
A sound that is heard again after being reflected from a hard surface like a wall or a mountain
400
True or false. Sound reflects well off of hard, shiny surfaces such as floor tiles.
True – That is why you sound louder in the bathroom!
400
Describe 4 ways we can protect ourselves and the environment from noise pollution.
Ear plugs, placing airports away from houses, soundproof buildings, reducing noise in classroom and school, and not turning up musical devices (iPods) too high
400
Can noise pollution be harmful only to people and animals living on the land?
No - ocean noise pollution/air noise pollution affects marine animals (whales, dolphins, fish) and many birds (owls and bats)
500
Name 5 parts of the human ear
- outer ear, inner ear, middle ear, cochlea, eardrum, ear canal, ear bones, pinna
500
True or False - Sound vibrations can travel through air, water, wood, glass, or other material.
True - Sound only travels through matter (There is no air in space so there is no sound in space!)
500
________ conduct better sound than _______ and ________ because the molecules in ________ are closer together
Solids conduct better sound than liquids and gases because the molecules in solids are closer together
500
Excessive noise (85 decibels and higher) which damages the hair cells of the inner ear and causes deafness (hint: NIHL)
- noise-induced hearing loss
500
Name 4 things that can happen to you when there is too much sound at home and at school.
- trouble sleeping - headaches - difficulty hearing - trouble concentrating - becoming frustrated - not thinking clearly
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