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# Physical Science Class - PowerPoint PPT Presentation

Physical Science Class. Today’s Topics: Waves and Wave Properties. To begin class.. Open 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?.

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Presentation Transcript

Today’s Topics:

Waves and Wave Properties

To begin class..Open your Science Notebooks

• What do you think of when you hear the word wave?

• Write a brief description in yourscience notebook of what you think a wave is

• A Wave is disturbance that transfers energy from 1 place to another

• Medium: the matter a wave passes through

• Amplitude (height): the distance a medium rises or falls from its resting point

• Wavelength: the distance from any 1 point on a wave to an identical point on the next weave. This measures the length of 1 cycle

http://www.physicsclassroom.com/class/waves/Lesson-1/Categories-of-Waves

• Let’s view a simulation

A combination of

transverse and longitudinal.

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

• http://news.bbc.co.uk/2/hi/4136289.stm

• This shows a simulation on how a tsunami is formed

You Tube has many videos of the 2004 Tsunami waves and the destruction

• The wavelength, λ, of a wave is the distance from any point on one wave to the same point on the next wave along

Image courtesy of: http://www.bbc.co.uk/bitesize/standard/physics/telecommunications/communication_using_waves/revision/5/

• The amplitude, a, of a wave is the distance from the centre line (or the still position) to the top of a crest or to the bottom of a trough. Measured in meters

• The frequency, f, of a wave is the number of waves passing a point in a certain time. We normally use a time of one second, so this gives frequency the unit hertz (Hz), since one hertz is equal to one wave per second

• http://safeshare.tv/w/SkYbVfMRpv

to be a

Millionaire?

Let’s Play!! Waves Review and Practice

light

matter

water

Is this your

Yes

No

Question 1?A wave is a disturbance that transfers ______ from 1 place to another

Compression, longitudinal, surface

Transverse, surface, compression

Longitudinal, transverse, surface

Is this your

Yes

No

Question 2?Name the 3 types of waves

\$100

yards

meters

Meters/seconds

Is this your

Yes

No

Question 3?How is amplitude measured in units?

\$200

wavelength

frequency

meters

Is this your

Yes

No

Question 4?The distance crest to crest is:

\$500

second

hour

minute

Is this your

Yes

No

Question 5?1 hertz is equal to 1 wave per _________

\$1000

Longitudinal waves

Transverse waves

Surface waves

Is this your

Yes

No

Question 6?Ocean waves are _______

\$5000

circular

Side to side

longitudinal

Is this your

Yes

No

Question 7?Transverse waves move:

\$10,000

A certain time

1 hour

Meters per second

Is this your

Yes

No

Question 8?Frequency of a wave is the # of waves passing a point in:

\$50,000

Hertz/second

hertz

horsepower

Is this your

Yes

No

Question 9?Hz stands for

\$100,000

soil

air

medium

Is this your

Yes

No

Question 10?The matter a wave passes through is:

\$50,000

Is this your

Yes

No

Question 11?

\$1,000,000

B

C

D

Poll the audience

?

C

B

D

A

?

?

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