1. WAVES
WAVES & THEIR BEHAVIOR

2. Essential Standard
6.P.1 Understand the properties of waves and the wavelike property of energy in earthquakes, light and sound waves.

3. Clarifying Objective
6.P .1.1 Compare the properties of waves to the wavelike property of energy in earthquakes, light and sound.

4. Essential Questions What are the 5 PROPERTIES of waves?
What are waves?
What are the characteristics of Transversal Waves?
What are the characteristics of Longitudinal Waves?
What is a COMPRESSION in a wave?
What is a RAREFACTION in a wave?

5. Waves
Waves are a disturbance or vibration a way of transferring ENERGY from one place to another
They transport ENERGY from on place to another
There are different categories & types of waves
They all have their own characteristics that make them waves

6. Essential Questions
Get with a partner and answer…
What are waves?

7. Crest & Trough of Waves The CREST of the wave is the top of the wave
The TROUGH of the wave is the bottom of the wave
Energy moves through crests and troughs from one place to another

8. Categories of Waves
There are two categories of waves. All waves transfer energy through
Transversal movement
Longitudinal movement

9. Transversal Waves
Transversal Waves are waves that make a perpendicular motion in the direction of the wave
An example would be an ocean wave moving towards the beach

10. Longitudinal Waves
Longitudinal Waves are like pinball waves. These waves vibrate in the direction of the flow of energy
An example is a pinball machine

11. Essential Questions Get with a partner and answer…
What are the characteristics of Transversal Waves?
What are the characteristics of Longitudinal Waves?

12. Types of Waves
There are 3 main types of waves. All waves fall into one of these types
Mechanical waves
Electromagnetic waves
Matter waves.
Mechanical Waves act as the propagation of a disturbance through a material medium due to the repeated periodic motion of the particles of the medium about their mean positions, the disturbance being handed over from one particle to the next. Electromagnetic Waves are the disturbance, which does not require any material medium for its propagation and can travel even through vacuum. They are caused due to varying electric and magnetic fields. Matter Waves are the waves produced in electrons and particles.

13. Mechanical Waves
Mechanical Waves are waves that require a solid, liquid or gas to move through
Transversal Waves
Longitudal Waves
SOUND & SHOCK ARE 2 EXAMPLES OF MECHANICAL WAVES

14. Electromagnetic Waves
Electromagnetic Waves are waves that wave through electromagnetic fields
These are the only waves that do not require a medium to travel through
Transversal Waves

15. Properties of Waves There are 5 different properties of a wave
Waves must have these things (properties) to be waves
Wavelength
Amplitude
Frequency
Speed
Period

16. Wavelength The Wavelength is the distance between crests of a wave
Distance between top of the wave to top of the next wave

17. Wave Amplitude
The Amplitude of a wave is the distance from the (middle of the wave to the top) or (the middle of the wave to the bottom
From middle to crest or from middle to trough

18. Wave Frequency
The Frequency of a wave is how many waves are in a given space
The more waves in the given space the higher the frequency

19. Wave Speed
The Speed/Velocity of a wave is how far one wave travels in a given amount of time
An example would be if you took a stop watch and set it to 10 seconds and then measured with a ruler how far one wave moved. That would be the speed of the wave
How fast is the water carrying the individual wave in a given space

20. Wave Period
Wave Period is the time it takes to move from one crest to the next crest
For example if you take a stopwatch and time the time it takes for your boat to move from the top of one wave to the top of the next wave you have your wave period

21. Essential Questions Get with a partner and answer…
What are the 5 PROPERTIES of waves?

22. Wave Particles All waves are moving particles of matter/atoms
The particles of matter/atoms are either spread far apart or in close together depending what part of the wave the matter is in
Compression
Rarefaction

23. Compression
Compression is when the particles are pressed very close together
If you look at the picture to the right compression is marked by (Y)
Mechanical longitudinal waves are also called compressional waves or compression waves, because they produce compression and rarefaction when traveling through a medium. The other main type of wave is the transverse wave, in which the displacements of the medium are at right angles to the direction of propagation.

24. Rarefaction occurs when the particles are far apart from each other
If you look at the picture to the LEFT Rarefaction is marked by (X)
Rarefaction

25. Essential Questions Get with a partner and answer…
What is a COMPRESSION in a wave?
What is a RAREFACTION in a wave?

26. Important Points Crest is the top of a wave
Trough is the bottom of a wave
Transversal waves are up & down hills
Longitudinal waves are like a coiled spring
Mechanical Waves must pass through a medium (solid, liquid or gas)
Electromagnetic Waves do not have to pass through a medium (pass through a vacuum)
Compression is when particles in a wave are CLOSE together
Rarefaction is when particles are FAR APART
There are 5 properties of waves
Wavelength
Amplitude
Frequency
Speed
Period