Waves Flashcards
What are the two things that allow waves to occur?
1-matter
2-energy
True or false.
Energy has no mass.
True.
What’s a vibration?
Continuous motion that disturbs it’s environment.
What is a wave?
A disturbance created by vibrations.
Waves can move _________(but not matter) through space.
energy
What are mechanical waves?
Waves that travel through matter.
Name all the waves. (3 types)
1-sound waves
2-water waves
3-earthquake waves
Water waves travel through what?
Water.
Sound waves travel through what?
Any state of matter,( liquids, solids, and gases)
Waves cause the medium to do what?
Vibrate back and forth.
How is the speed of sound determined?
It’s determined by how densely packed the particles are in the medium.
The closer the particles, the faster the _______ travels.
Sound
What is the amp?
Amp= 1/2 the wave length.
Higher frequency= ______ _______
High pitched.
What is the wave height?
The vertical distance between the top and bottom of the wave.
What is the wave length?
The distance between the tops of two waves.
What is the measurement of frequency?
Hertz (Hz)
Hz=one wave per second
Sound travels faster through_______ than air.
Solids.
Sound is reflected by hard smooth ________ and is absorbed by carpets and curtains.
Surfaces.
What is an echo?
It’s a reflected sound that arrives 1/10 of a second after the original sound.
How are bats and echoes related?
Echolocation: bats produce high frequency ultrasonic sound waves.
Name 2 reasons why bats use echolocation.
1-to locate obstacles in the dark
2-to locate prey
