When air particles are close together in a vibration, this is called a ___.
compression
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
Why does copper sulfate appear to be blue?
it reflects blue wavelength (and absorbs other colors)
Colored pieces of glass or plastic that absorb some wavelengths and transmit others are called __.
filters
How do we see the Moon?
light from Sun reflects off the Moon's surface
All sounds come from sources that ___.
vibrate
TRUE or FALSE - Sound is carried by air which moves from the source to our ears.
FALSE
Name the colours of the light spectrum in order (7 total).
red - orange - yellow - green - blue - indigo - violet (ROYGBIV)
Bigger vibrations give ___ sounds.
louder
What is this?
prism
When light is blocked by an opaque object, this makes a ___.
shadow
When light changes speed and bends, this is called ___.
refraction
When white light is split into a spectrum, this is called __.
dispersion
If a green filter was used to shine light on a red book, what color would it appear?
black
Which wave represents a louder sound - A or B?
B