Science Test 10.1-3 11.1

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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


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