Vocabulary
The form of energy that travels as waves.
What is sound?
Bats use this to find their way in the dark.
a. overtones
b. ultrasound
c. echolocation
d. timbre
What is echolocation?
The organ (or body part) used for sight.
What is the eye?
The material through which waves can travel.
What is a medium?
The unit of frequency is the _________.
a. hertz
b. decibel
c. m/s
d. pitch
What is hertz?
The color that is not one of the 7 colors of the visible spectrum is
a. red
b. blue
c. indigo
d. brown
What is brown?
A straight line that shows the direction of light.
What is a ray?
True or False:
A sound wave cannot travel through a vacuum.
What is True
An object that absorbs all colors of light and does not reflect any appears
a. green
b. white
c. black
d. blue
What is black?
A material that blocks light.
What is opaque?
True or False:
An echo is a sound wave that is been made louder.
What is false.
It is reflected (bounces off)
True or False:
Light needs a medium to travel.
What is false?
A material that lets some light through.
What is translucent?
The property of a wave that determines its pitch.
What is frequency?
A sheet of clear glass is _______ because it allows light to pass through it easily.
a. opaque
b. translucent
c. transparent
What is transparent?