Cat 1
What is a way people use light to transfer information?
Lighthouse, traffic lights
What happens when the amount of energy in the water changes?
Waves can form and objects move up and down
How do people use symbols to transfer information?
flags, stop signs, hand signals in a classroom
How do sound waves travel through solids?
Particles are closest together, sound travels the quickest
List 3 ways you can use vibration to make sounds
strumming a guitar
tapping on a desk
humming a song
Why is some light invisible to the human eye?
Some light waves have shorter or longer wavelengths, most wavelengths of light can not be seen by the human eye
Give an example of how energy from a sound wave can cause changes
glass can be shattered by a high pitched sound
Give 2 examples of objects from which light waves originate?
light bulb and sun
What kind of energy does a solar oven use, and where does that energy come from
solar energy, the sun
How do sound waves travel through gases?
particles are farthest apart, sound travels slowest
How does sound travel through liquids?
Particles are somewhat close, sound travels slower than in solids
Can light waves travel through solids, liquids, and gases?
some, depending on how transparent they are
What is a wave?
a disturbance that transfers energy through matter or through space
What is a trough?
the lowest part of the wave
What does crest mean, in regards to a wave?
The highest part of the wave
What is code?
a pattern of symbols that can be used to communicate a message
What is frequency, in regards to waves?
the number of times a wave peaks over a period of time
Can light waves pass through empty space?
yes, light waves don't need matter to travel through
What is a signal, in regards to waves?
A symbol sent over a distance
What does vibrate mean?
to move back and forth quickly