All sounds come from sources that ___.
vibrate
Bigger vibrations give ___ sounds.
louder
What is the unit for measuring frequency of a wave?
hertz = Hz = vibration per second
Which wave has a higher pitch - A or B?
A
Which wave represents a louder sound - A or B?
B
When air particles are close together in a vibration, this is called a ___.
compression
TRUE or FALSE - Sound is carried by air which moves from the source to our ears.
FALSE
Colored pieces of glass or plastic that absorb some wavelengths and transmit others are called __.
filters
Why does copper sulfate appear to be blue?
it reflects blue wavelength (and absorbs other colors)
If a green filter was used to shine light on a red book, what color would it appear?
black
