Waves Flashcards
What is a disturbance that transfers energy through matter or space?
wave
Energy from ______________ makes waves in the oceans.
the wind
What is the highest part of the wave?
crest
What is the lowest part of the wave?
trough
What is the distance from one wave’s crest to the next wave’s crest?
wave length
What is the vertical distance from a wave’s through to its crest?
wave height
What word means to move back and forth quickly?
vibrate
T or F: Sound waves must move through matter.
True
What is matter?
Anything that takes up space.
What are the three states of matter?
Liquid, solid, gas
Name the order of the states of matter in which sound moves fastest and farthest:
- Solids
- Liquids
- Gas
T or F: Whales can detect sounds hundreds, maybe thousands of miles away.
True
What is the way that humans perceive loudness of sound?
volume
What word do we use to describe how high or low sound is?
pitch
What happens to pitch as the waves get faster?
The pitch gets higher.
What happens to pitch as the waves get slower?
The pitch gets lower.
What is happening when the wave height of a sound wave is getting bigger?
The volume is getting louder.
What is happening when the wave height of a sound wave is getting smaller?
The volume is getting softer.
T or F: If the conditions are right, sound waves can move about three football fields in one second.
True
T or F: Sound moves faster in warmer air and slower in cooler air.
True
T or F: Sound moves more quickly in gas than liquid.
False
T or F: Sound is a form of energy.
True
What property of sound causes glass to shatter?
pitch
What do sharks and spiders have all over their body to sense sound?
Hairs
What animal can hear sounds that are too high for people to hear.
dogs
What animal can hear sounds that are too low for humans to hear.
elephants
What animal has the greatest sense of hearing?
wax moth
Like sound, light is a form of energy that travels in ____________.
waves
T or F: Light is a form of energy.
True
What’s one big difference between the way light travels and sound travels?
Light doesn’t have to travel through matter, it can travel in empty space.
What is another name for light waves?
radiation
Why can the moon be so bright?
It is reflecting the sun’s light.
When there is a lightning storm, why do you see the lightning before you hear the thunder?
Light waves move faster than sound waves.
Objects that allow light to pass through them are called _____________-.
transparent
Objects that block light are called ____________.
opaque
What do opaque objects cast when light hits them?
shadow
What are objects that let some, but not all, light pass through them?
translucent
T or F: Translucent objects block some light and cast slight shadows.
True
What color has the fastest waves?
violet
What is the height of a wave called?
wave height or amplitude
Light waves with higher amplitudes are ____________.
brighter
