# Physical Sci ch 10

## Terms

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A wave is a disturbacne that transmits ___________.
ENERGY
During Constructive Intereference
a) Amplitude Increase
b) Frequency Decrease
c) Wave Speed Increase
d) All of the Above
A: Amplitude Increase
A __________ is any disturbance that transmits energy.
WHAT IS A WAVE
What are some things in daily life that use " waves"
Microwave
Sound
Water
True or False
Energy can be carried by a wave
TRUE
How does a "wave" travel?
It uses energy.
A ___________ is a substance through which a wave can travel.
WHAT IS A "MEDIUM"
A medium can be in what three forms?
SOLID
LIQUID
GAS
What type of waves require a medium?
SOUND WAVES
________ is the medium of which sound waves travel in.
AIR
Sound waves can travel through which medium ( media)
SOUND
LIQUID
GAS
How do sound waves travel?
As Vibrations
TRUE OR FALSE
Sound can be heard with out a medium
FALSE
You will not hear the sound if there is no particle to vibrate against.
Waves that need a medium (media) are called___________ waves
MECHANICAL
Describe how a longitiudial wave travels.
The particles of the medium vibrate back and forth the path that the wave travels.
What type of wave is a longitudinal wave?
SOUND WAVE
A ____________ wave is when there is a boundary of two media.
TRANSVERSE WAVE
Describe how transverse waves work.
Waves move in circles verses up and down.
How do transverse waves differ from longitudinal waves.
Transverse waves move across to the direction of the wave. Longitudinal Waves move back and forth like a spring
Why could we not hear an explosion on earth?
Beause there is no air, gas, or water to have the sound travel in.
What kind of waves do not require a media.
Electromagnetic Waves
Give some examples of electromagnetic waves./
X-Ray
Microwave
TV Signal
The _________ of a wave it the maximum distance the wave vibrates
AMPLITUDE
The larger the amplituede is the _________ the wave is.
TALLER
Larger amplitude means (larger) or (smaller) amount of energy
LARGER
Give an example with a jump rope.
You have to shake the rope harder to make the waves "larger" verses less energy to make "smaller" waves
The _______ is the distance between two adjacent crests or compressions is a series of waves.
WAVELENGTH
True or False
All wave lengths will be equal from one point to the next.
TRUE
If you measure at any given wavepoint. the measurement will be the same for any given wave.
The number of waves produced in a given amount of time is called the ________.
FREQUENCY
How is frequency measured?
Counting the number of crests
The __________ of a wave is the maximum distance the wave vibrates from its resting position.

DRAW A WAVE AND SHOW THE AMPLITUDE AND WAVE LENGTH
AMPLITUDE
The speed in which a wave travels is the ___________.
WAVE SPEED
How can wave speed be calculated?
Wavelength x Frequency = SPEED
What is the speed of the following

Frequence (f) = 3/second
Wavelength = 0.5m
.05M X 3hX = 1.5 M/S
_____________ is the bending of a wave as it passes at an angle from one medium to another.
REFRACTION
Give an example of refraction:
The speed changes when an object is falling from air to water. It will travel faster through air, then slow down as it travels through water,
_______________ is the bending of waves around a barrier.
DIFFRACTION
Why can you hear sound through a barrier better than see light through the same barrier.
Sound waves are much longer than light waves.
What is interference
When two waves meet in the same space
Describe an incident of interference with musical instruments.
What happens with the sound
Sound Waves are traveling all at the same time from each instrument. When together, it creates a louder sound becasue they overlap
What happens when a wave is refracted?
The speed changes. This causes the wave to bend.
A ____________ wave is a wave that forms a stationary pattern.
STANDING WAVE
Describe what happens in a standing wave. Is it really still?
Waves are traveling in two directions making it appear that they are still. Yet they are really moving.
What is resonance and when does it occur?
When an object is vibrating at or near the frequency of another object.

The Xylophone is an example. The hitting with the mallot causes a vibration in the keys and the air.
How can resonance be destructive?
A Bridge:
You have vibratin from the cars and other elements like wind which cause a bigger vibration, which can cause a bridge to break
As the wavelength increases, the frequency _________________.
Decreases
What describes how we can hear sound around the corner.
DIFFRACTION
WAVES TRANSFER...

a) Matter
b) Energy
c) Particles
d) Water
ENERGY
Waves that dont require a medium are?
ELECTROMAGNETIC

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