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physical science classroom
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Physical Science Class
Today’s Topics:
Waves and Wave Properties
To begin class..To begin class..Open your Science NotebooksOpen your Science Notebooks
• What do you think of when you hear the word wave?
• Write a brief description in your science notebook of what you think a wave is
How can we describe a wave?
A Wave is disturbance that transfers energy from 1 place to another
Let’s Review Key TermsMedium: the matter a wave passes throughAmplitude (height): the distance a medium
rises or falls from its resting pointWavelength: the distance from any 1 point
on a wave to an identical point on the next weave. This measures the length of 1 cycle
Image source: http://www.physicsclassroom.com/class/waves/Lesson-1/Categories-of-Waves
Longitudinal vs. Transverse Longitudinal vs. Transverse WavesWaves
Let’s view a simulation Let’s view a simulation
http://www.animatedscience.co.uk/blog/http://www.animatedscience.co.uk/blog/wp-content/uploads/focus_waves/tl-wp-content/uploads/focus_waves/tl-wave.htmlwave.html
Surface WavesSurface Waves
A A combinationcombination of oftransverse transverse and and longitudinallongitudinal..An example is an Ocean Wave: As a wave
travels through the medium (water), the particles of that medium travel in clockwise
circles.
As a wave heads into shore, the top of the wave is free but the bottom of the wave
becomes constricted, causing the wave´s crest to build. Eventually the water is unable to
support the wave and it breaks
Let’s watch and see how a wave’s Let’s watch and see how a wave’s crest builds…crest builds…
http://news.bbc.co.uk/2/hi/4136289.stmhttp://news.bbc.co.uk/2/hi/4136289.stmThis shows a simulation on how a tsunami is This shows a simulation on how a tsunami is
formedformed
You Tube has many videos of the 2004 Tsunami waves and the destruction
Parts of a WaveParts of a WaveThe The wavelengthwavelength, , λλ, of a wave is the , of a wave is the
distance from any point on one wave to distance from any point on one wave to the same point on the next wave alongthe same point on the next wave along
Image courtesy of: http://www.bbc.co.uk/bitesize/standard/physics/telecommunications/communication_using_waves/revision/5/
Parts of a WaveParts of a WaveThe The amplitudeamplitude, , aa, of a wave is the , of a wave is the
distance from the centre line (or the still distance from the centre line (or the still position) to the top of a crest position) to the top of a crest oror to the to the bottom of a trough. Measured in metersbottom of a trough. Measured in meters
Parts of a WaveParts of a WaveThe The frequencyfrequency, , ff, of a wave is the number , of a wave is the number
of waves passing a point in a certain time. of waves passing a point in a certain time. We normally use a time of one second, so We normally use a time of one second, so this gives frequency the unit hertz (Hz), this gives frequency the unit hertz (Hz), since one hertz is equal to one wave per since one hertz is equal to one wave per secondsecond
Video - Parts of a WaveVideo - Parts of a Wave
http://safeshare.tv/w/SkYbVfMRpvhttp://safeshare.tv/w/SkYbVfMRpv
Let’s Play!! Waves Review and Practice
$1,000,000$500,000$100,000$50,000$10,000$5000$1000$500$200$100
Is this your Final Answer?
Yes No
Question 1?A wave is a disturbance that transfers
______ from 1 place to another
energy
light
matter
water
$1,000,000$500,000$100,000$50,000$10,000$5000$1000$500$200$100
Is this your Final Answer?
Yes No
Question 2?Name the 3 types of waves
Ocean, land, water
Compression, longitudinal, surface
Transverse, surface, compression
Longitudinal, transverse, surface
$100
$1,000,000$500,000$100,000$50,000$10,000$5000$1000$500$200$100
Is this your Final Answer?
Yes No
Question 3?How is amplitude measured in units?
feet
yards
meters
Meters/seconds
$200
$1,000,000$500,000$100,000$50,000$10,000$5000$1000$500$200$100
Is this your Final Answer?
Yes No
Question 4?The distance crest to crest is:
amplitude
wavelength
frequency
meters
$500
$1,000,000$500,000$100,000$50,000$10,000$5000$1000$500$200$100
Is this your Final Answer?
Yes No
Question 5?1 hertz is equal to 1 wave per _________
inches
second
hour
minute
$1000
$1,000,000$500,000$100,000$50,000$10,000$5000$1000$500$200$100
Is this your Final Answer?
Yes No
Question 6?Ocean waves are _______
Compression waves
Longitudinal waves
Transverse waves
Surface waves
$5000
$1,000,000$500,000$100,000$50,000$10,000$5000$1000$500$200$100
Is this your Final Answer?
Yes No
Question 7?Transverse waves move:
Up and down
circular
Side to side
longitudinal
$10,000
$1,000,000$500,000$100,000$50,000$10,000$5000$1000$500$200$100
Is this your Final Answer?
Yes No
Question 8?Frequency of a wave is the # of
waves passing a point in:
1 minute
A certain time
1 hour
Meters per second
$50,000
$1,000,000$500,000$100,000$50,000$10,000$5000$1000$500$200$100
Is this your Final Answer?
Yes No
Question 9?Hz stands for
height
Hertz/second
hertz
horsepower
$100,000
$1,000,000$500,000$100,000$50,000$10,000$5000$1000$500$200$100
Is this your Final Answer?
Yes No
Question 10?The matter a wave passes through is:
matter
soil
air
medium
$50,000
$1,000,000$500,000$100,000$50,000$10,000$5000$1000$500$200$100
Is this your Final Answer?
Yes No
Question 11?
Wrong Answer
Wrong Answer
Correct Answer
Wrong Answer
$1,000,000