Waves And More Waves Flashcards
What are the two things that allow waves to occur?
1-matter
2-energy
What is matter?
Anything that has a weight and that takes space.
What is energy?
The ability to do work.
What would happen if we didn’t have energy?
There would be no movement within the system.
True or false.
Energy has no mass.
True.
Name 2 ways energy can move mass.
1-2 objects collide
2-objects vibrate and produce waves
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.
Where do mechanical waves pass through?
Different materials or media.
What do mechanical waves create?
Disturbances in the medium.
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 must be produced by a source…. give a “formula” to understand this.
No matter=no particles to push against=no sound
How fast does sound travel?
It travels at different speeds.
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
