Knowt Sound Waves Quiz and Review Guide

Waves transfer through a medium or empty space. 

energy

A section of a sound wave where the particles are crowded together is called a

compression.

A substance through which a wave can travel is a

medium.

How does a speaker work? Refer to the diagram below.

One of the speaker's magnets is a permanent magnet (meaning that it is always magnetized) and the other is an electromagnet meaning it needs electricity to run through it to work.

When an electrical signal is sent to the speaker, it creates a fluctuating magnetic field that pushes and pulls the coil, (push and pull force) causing it to move back and forth with the attached speaker cone. 

The cone vibrates and causes air molecules to collide with each other

transferring energy like a domino effect, until it reaches our ears.

When you increase the frequency of a transverse wave,

Circle One:  Wavelength will increase      Wavelength will decrease  

 Wavelength will decrease  

A ruler vibrates more slowly, so has a lower frequency. A shorter ruler vibrates more quickly so has a frequency.

longer,higher

Explain how bats locate their insect prey with low and high frequency sound waves. Use the word

Echolocation. Using a process called echolocation, bats emit high-frequency sound waves (ultrasound) that bounce off objects in the environment, and then interpret the returning echoes to determine the location, size, and shape of its prey.

5. Count how many full waves there are on both models. 

TOP 1_ BOTTOM 5_

6. Which wave has a higher frequency?                         

  TOP ____ BOTTOM X_

7. Which wave has lower energy?                                  

  TOP X_  BOTTOM ___

8. Which wave has a greater (higher) pitch?                  

  TOP ____  BOTTOM X_

9.What can these waves travel through?

Circle: Solids   Liquids   Gases   Space

Energy Wave

disturbances that transfer energy through space or a medium (like water, air, or fields) without permanently moving the matter itself

Sound

vibrations that travel through the air or another medium and can be heard when they reach a person's or animal's ear

Vibrations

an instance of vibrating.

speaker

person giving a speech or talk, a fluent user of a language, or the presiding officer of a legislature

electromagnetic froce

a fundamental interaction governing charged particles, attracting opposite charges (like protons and electrons) and repelling like charges, holding atoms together and creating phenomena from magnetism to light

crest

the top of a mountain or hill.

trough

A trough is a low point in a process that has regular high and low point

wavelengh

he distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.

amplitude

breadth, range, or magnitude.

frecuency

the rate at which something occurs or is repeated over a particular period of time or in a given sample.

rest line

A "rest line" refers to the central, horizontal line in wave diagrams

pitch

the quality of a sound governed by the rate of vibrations producing it; the degree of highness or lowness of a tone.

echlocation

the location of objects by reflected sound, in particular that used by animals such as dolphins and bats.

volume

loundness

compression wave

a wave where particles of the medium vibrate parallel to the wave's direction, causing alternating zones of high pressure/density (compressions) and low pressure/density (rarefactions) as it travels through a substance, like sound in air or P-waves in earthquakes.

wave speed

a wave where particles of the medium vibrate parallel to the wave's direction, causing alternating zones of high pressure/density (compressions) and low pressure/density (rarefactions) as it travels through a substance, like sound in air or P-waves in earthquakes.

medium

the substance or material (solid, liquid, gas, or even vacuum) through which energy

thunder

a loud rumbling or crashing noise heard after a lightning flash due to the expansion of rapidly heated air.