1. Jag Mark Pick up one of each of the papers on the front lab table.
Get the “Waves” page trim around the gray dotted lines.
Color the title “Waves”
Improve your INB: Table of Contents, Page numbers, Color, Neatness.
Study vocabulary and add color to the pictures

2. List all the waves you can identify.
You have just returned home from a day at the beach. You are hungry from playing in the ocean under the hot sun. You microwave some left over pizza. The phone rings, and you turn on the radio.

3. 1.       The maximum distance that the particles of a medium move from the rest position is the
A.      Amplitude
B.      Wavelength
C.      Frequency
D.      Speed
2.       A wave travels through a medium because
A.      The medium’s particles are carried along with the wave.
B.      The wave’s energy passes from particle to particle.
C.      The medium transfers electromagnetic energy
D.      The wave increases the potential energy of its medium

4. GUITAR STRING VIDEO

5. How does energy travel?

6. Energy travels in waves!
BrainPop Video
Have you ever "done the wave" as part of a large crowd at a football or baseball game? A group of people jumps up and sits back down, some nearby people see them and they jump up, some people further away follow suit and pretty soon you have a wave travelling around the stadium. The wave is the disturbance (people jumping up and sitting back down), and it travels around the stadium. However, none of the individual people the stadium are carried around with the wave as it travels - they all remain at their seats.

8. Wave: A disturbance that transmits energy through matter or space
Water waves in the ocean, microwaves inside microwave oven, light/radiant waves from sun, seismic waves, sound waves
As a wave travels, it uses its energy to do work on everything in its path. (water, boats, ducks)

9. Mechanical & Nonmechanical Waves
Mechanical waves require a material medium.
Examples are:
Sound waves
Water waves
Shock waves in an explosion
Other waves, such as electromagnetic waves, do not require a material medium.
Examples are:
Light
X-rays
Radio waves
Ask question, can we hear the Sun? Why not?
(1)

10. Require a medium to travel.
Mechanical Waves
Incapable of traveling through a vacuum
Sound waves, slinky waves, water waves, seismic waves

11. Medium A substance/matter through which a wave can travel
Can be a solid, liquid, or gas

12. All waves are produced by vibrations.
When a particle vibrates, it can pass its energy to a particle next to it. As a result, this second particle will vibrate.

13. A medium can be Solid, Liquid, Gas or a Combo of these.

14. Molecules pass energy along to neighbor molecules who then pass energy to neighbor.

15. All waves carry energy without transporting matter from place to place.

17. Waves will travel as long as there is energy to carry.

18. We will discuss two types of mechanical waves:
Transverse
Longitudinal/compressional

19. Transverse Waves
Transverse wave – a wave whose particles vibrate perpendicular to the direction of travel of the wave.
Examples include:
Surface waves on water.
Electromagnetic waves
Animation courtesy of Dr. Dan Russell, Kettering University

20. Transverse wave
A wave in which the particles of the wave’s medium vibrate perpendicular to the direction the wave is traveling
In a transverse wave the particle displacement is perpendicular to the direction of wave propagation. The animation below shows a one-dimensional transverse plane wave propagating from left to right. The particles do not move along with the wave; they simply oscillate up and down about their individual equilibrium positions as the wave passes by. Pick a single particle and watch its motion.The S waves (Secondary waves) in an earthquake are examples of Transverse waves. S waves propagate with a velocity slower than P waves, arriving several seconds later.

21. Transverse Waves UP and DOWN
In a transverse wave the particle displacement is perpendicular to the direction of wave propagation. The animation below shows a one-dimensional transverse plane wave propagating from left to right. The particles do not move along with the wave; they simply oscillate up and down about their individual equilibrium positions as the wave passes by. Pick a single particle and watch its motion.The S waves (Secondary waves) in an earthquake are examples of Transverse waves. S waves propagate with a velocity slower than P waves, arriving several seconds later.

22. Longitudinal Waves
Longitudinal wave- a wave whose particles vibrate parallel to the direction of travel of the wave.
Examples include:
Sound waves
Compression waves in explosions.
Animation courtesy of Dr. Dan Russell, Kettering University
In a longitudinal wave the particle displacement is parallel to the direction of wave propagation. The animation at right shows a one-dimensional longitudinal plane wave propagating down a tube. The particles do not move down the tube with the wave; they simply oscillate back and forth about their individual equilibrium positions. Pick a single particle and watch its motion. The wave is seen as the motion of the compressed region (ie, it is a pressure wave), which moves from left to right.
The second animation at right shows the difference between the oscillatory motion of individual particles and the propagation of the wave through the medium. The animation also identifies the regions of compression and rarefaction.
The P waves (Primary waves) in an earthquake are examples of Longitudinal waves. The P waves travel with the fastest velocity and are the first to arrive.

23. Longitudinal/Compressional BACK and FORTH

24. Electromagnetic Waves
Do not require a medium
Electromagnetic Waves

25. Not all waves need a medium to travel – light and radio waves can travel through space Electromagnetic waves.

26. Electromagnetic waves can travel through substances such as air, water, and glass, but travel fastest through space.

27. Electromagnetic Waves
Waves that do not require a medium
Example: Radio, x-rays, light, microwaves, heat
However, electromagnetic waves can travel through substances such as air, water, and glass, but travel fastest through empty space
Do not need matter to transfer energy.
Are made by vibrating electric charges and can travel through space by transferring energy between vibrating electric and magnetic fields.
Are transverse waves which mean the particles vibrate ACROSS the direction of the wave

28. Bill Nye Video: Parts of a Wave

29. Parts of a Wave

30. Parts of a Wave Wavelength –
In transverse waves – distance between two crests or troughs
In longitudinal waves – distance between two compressions or rarefactions
Frequency – the number of waves that pass a point in one second
Long wavelengths have low frequencies
Short wavelengths have high frequencies
Amplitude (wave height) – the distance from the middle of a transverse wave to the crest or trough. The maximum distance a wave vibrates from its rest position

31. Properties of Waves Wave Speed
The speed at which a wave travels

32. Change amplitude!
Hold a slinky on the floor between you and your partner. Move one end from side to side at a constant rate. The number of times you move it from side to side is (back and forth) each second is the frequency.
Keeping the frequency the same, increase the amplitude. How did the change in amplitude affect the wavelength? Record.

33. Change frequency!
Now shake the slinky back and forth twice as fast (double the frequency).
What happened to the wavelength?
Record in packet.

34. Summary
Write 3 sentences showing how each property changes the other: use the terms frequency, amplitude and wavelength.

35. Transverse Waves

36. Longitudinal/Compressional Wave

37. Properties of Waves Amplitude
The maximum distance a wave vibrates from its rest position

38. Properties of Waves Wavelength
The distance between one point on a wave and the corresponding point on an adjacent wave in a series of waves

39. Properties of Waves Frequency
The number of waves produced in a give amount of time

41. Reflection/Homework
Complete your Venn diagram comparing transverse waves and longitudinal waves.

42. HOMEWORK: Vocabulary Entries
Wave:
Wavelength:
Medium:
Wave Speed:
Amplitude:
Transverse:
Longitudinal/Compressional:
Mechanical Waves:
Frequency: