Science Test 10.1-3 11.1
Wave
A repeating disturbance or movement that transfers energy through matter or space
As frequency increases, the wavelength...
decreases
A wave will travel as long as there is both _______ and a ________ to carry it.
energy, medium
What causes (all) waves to occur?
energy?
Sound travels slowest through which state of matter?
gas
Infrasonic
sound with frequencies lower than 20 HZ
Amplitude
the distance from the resting point to the trough or crest
Medium
the matter the waves travel through
Frequency
the number of wavelengths that pass a fixed point each second
What is one use for ultrasonic waves?
to see a fetus in a woman's body
Waves cannot travel through...
(empty) space
The Doppler Effect
A change in frequency due to a moving sound source
Echolocation
A process of locating objects by emitting sounds and detecting the sound waves that reflect back.
What is the relationship between amplitude and energy?
As energy increases, the amplitude increases
In a given medium, how are wavelength and frequency of a wave related?
As frequency increases, wavelength decreases
What's the relationship between intensity and loudness?
As the intensity increases, loudness increases
What's the relationship between pitch and frequency?
As the pitch increases, the frequency increases
How does temperature affect the speed of sound?
As the temperature incases, the speed of sound increases
How does tension affect the speed of a wave?
As the tension increases, the speed increases.
Ocean Waves
Disturb water and transfer energy through it.
You are creating a wove on a rope by shaking the rope back and forth. If you shake you hand the same distance but faster, what happens to the amplitude, frequency, wavelength, and speed?
Frequency increases, wavelength decreases, amplitude and speed remain the same
Frequency is measured in...
Hertz(HZ)
How do you know that light is a kind of wave that can travel without a medium?
Sun's light rays reach Earth through empty space.
Wavelength
The distance from crest to crest or from trough to trough
Why do surfers like water waves with high amplitudes?
The higher the wave, more energy it carries. Surfer will get a faster, longer wide from a high amplitude wave.
What is λ?
The wavelength symbol.
What are two types of mechanical waves?
Transverse waves and Compressional waves
How do particles move differently in transverse waves and in surface water waves?
Transverse-particles move perpendicular to direction of wave Surface-particles move up, down & side to side
Light Waves
Travel through empty space to transfer energy from one place to another ex: Sun to Earth
Waves that can only travel through matter are...
a) compressional wave b) mechanical wave c) transverse wave d) sound wave
Period
amount of time it wakes 1 wavelength to pass a point
The energy created by a wave can be increased by increasing its...
amplitude
Sound waves are an example of...
compressional waves
Decibels measure...
intensity of a sound
Which type of wave can travel through space?
light wave
Trough
low points on a wave
How can sound waves with different frequencies be produced by the same guitar string?
make string shorter or longer by moving fingers or tighten/loosen strings.
Compressional Wave
mater in the medium that moves back and forth along the same direction that the wave travels.
Waves transfer energy without transferring...
matter from place to place
Transverse Wave
matter in the medium moves back and forth at right angles to the direction the wave travels
A ______ is a material in which a wave travels through.
medium
What are 2 examples of compressional waves?
p-waves and sound waves
Pitch
Human perception of the frequency of a sound wave
When a compressional wave travels through a medium, with way does matter in the medium move?
In all the same directions the wave travels
Sound waves
compressional waves created by vibrations
Crest
high points on a wave
Seismic Waves
powerful earthquake waves that travel through Earth and transfers energy.
The Moon does not produce light by itself. How do we get moonlight?
reflects off the sun
Rarefaction
regions next to a compression that are spread apart, pr less dense
Compressions
regions where the medium becomes crowded together and more dense.
In a given medium, as the frequency of a wave increases, its speed...
remains the same.
What are 2 examples of transverse waves?
s-waves and light waves
Sound travels fastest through which state of matter?
solid
Ultrasonic
sound with frequencies greater than 20,000 HZ
What is Sonar?
system that uses the reflection of underwater sound waves to detect objects.
_________ waves are a combination of transverse and compressional waves
transverse waves
What is the velocity of a wave with a frequency of 760 HZ and a wavelength of 0.45 m?
v=ƒλ v= 320 m/s
A sound wave with a frequency of 260 HZ has a wavelength of 1.30 m.What is the speed of the wave?
v=ƒλ v=338 m/s
A wave with a wavelength of 15m travels at 330 m/s. Calculate it's frequency.
v=ƒλ ƒ= 22 HZ
What causes ocean waves to occur?
wind