Making Sounds
What are vibrations? (Hugo)
back and forth movements in molecules in matter
Does sound travel faster or slower in gases than solids? (Emma)
slower
Why can't you hear an astronaut talking in space? (Joel)
because there is no air in space
Why do construction works wear ear defenders? (Alex)
So the ear drum and their hearing is not damaged.
Will a short bar or a long bar make a high sound on a xylophone? (Mikael)
short bar!
When you talk what vibrates? (Alvin)
vocal cords
Sound travels 330 meters per _____ (David)
Second
Which type of material is best to absorb sounds? (Elliot)
soft matrials like foam or fabric.
What vibrates in your ears when you hear a sound? (Malcolm)
Your ear drums
Which unit do you use to measure volume? (John)
Decibels
How do hummingbirds make sound? (Melis)
The hummingbirds flap their wings so quickly that they make a sound!
Name two ways a whale can make sound. (Susan)
Use their larynx and leaping out of the water (hitting the water)
Why do cars have soft materials? (Emelie L)
So you don't hear the sound of the engine or of the other cars on the outside.
What is the outer flap of your ear called? (Melea)
Pinna
When the skin is tighter on a drum, does the sound get higher, lower, softer, or louder? (Jacob)
higher
When a whale crashes back into the sea it can be heard for 160 _______ meters, kilometers or miles? (Minea and Felicia)
kilometers
What part of your body can you feel vibrations without using your ears? (Alva)
You can feel vibrations with your skin.
Name 2 ways you can damage your ears. Describe what you can do to prevent this (Sam)
loud sounds (etc.) ear defenders, turning down the volume, etc.
Name 3 parts of the ear. (Elliot)
Which part of the ear is lined with tiny hairs? (David9
Pinna, ear drum, cochlea, hammer, etc.
The cochlea is lined with tiny hairs.
How do instruments make sound? Give an example (Anders)
They each have something vibrating.
What is a larynx? (Martin)
What are the bands called inside of your larynx? (Josefine)
Where is the larynx located? (Alina)
A larynx is a tube that takes air to and from your lungs.
They are called vocal cords.
The larynx is located in your throat
Evelyn Glennie is a musician who is deaf. She cannot hear what she is playing very well. How can she play well if she cannot hear the music? (Elias)
She feels the vibrations of her instruments with other parts of her body and can see the vibrations on some instruments.
Which person needs ear defenders more? Alva who is at a concert or Joel who is standing next to a parked air plane? (Maja)
The air plane isn't turned on, so Alva needs them more.
What does your auditory nerve do? (Milo)
Sends impulses to your brain.
What is pitch? Give an example of a string instrument AND a wind instrument and describe how to change the pitch. (Milo)
pitch is how high or low the sound is. A flute's pitch is changed by making the wind column longer (covering all the holes). A guitar's pitch is changed by shortening the strings or loosening the strings.