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