1. Warm-up: 01/24 Be ready for class, quiet and in your seat.
List today’s date above your warm-up.
Write the essential questions and objective for today from the board.
Can you answer any of the questions?
When you finish…Pick up the Wave Guided notes sheet from the front stool.

2. WARM-UP: 01/25
Keep your homework on your desk. I will come around and check it.
What is the main difference between an electromagnetic and a mechanical wave (use your notes)?
Keep your notes out and be ready to finish them today.

3. Warm-up
What is a wave?
What do waves transfer?
What are the two types of waves?

4. Warm-up: 01/28 Quietly review your Wave Essential vocabulary.
No Talking=Testing Mode
Today you will take the “Wave Essential Vocabulary Quiz”
Place your completed quiz in the designated box face down.
Open your textbook to Unit C.
Take out your waves booklet. Continue to work.

5. Warm-up Open your textbook to the page needed (from your rubric)
Take out your waves booklet. Continue to work and raise your hand if you need help, only whispering with your table partner while you work.
Do not leave your seat w/o my permission, if you are finished ask me for the next assignment.

6. Warm-up Describe the differences between reflection, refraction
and diffraction. Give an
example of each.
Take out your wave booklet and continue working (20 minutes of work time). What you do not finish must be completed for homework.

7. Warm-up
Be ready for class, have a pencil, your wave notes and your booklet out.
Look over notes-today you will complete the open notes waves assessment, remember the equation for wave speed is multiplication.
When finished preview the sound chapter in the textbook (section C) page C35-C65.

8. Essential questions What is a wave? What is a medium?
What is the difference between a longitudinal and transverse wave?
What are the properties of a wave?
What behaviors do all waves have in common?
What is the difference between reflection, refraction, and diffraction?

9. Nature of Waves
Wave—any disturbance (movement) that transfers energy through _______ or empty ________.
(Mechanical)
Waves move energy by ____________ __________in a medium.
Medium—a substance a wave can travel through; it can be__________________.
Characteristics of Waves: Sound waves
matter
space
vibrating
particles
solid, liquid, or gas

10. Nature of Waves
Waves that need a medium to move are called _________ ______________Examples:
_____________
Seismic waves (earthquakes)
Waves that do NOT need a medium are called _________
__________ ___
Examples:
_______ ______
Microwaves
x-rays
T.V. & radio waves
electromagnetic
waves
mechanical
waves
Sound waves
Visible light
Ocean waves
a8qi5X8 ocean wave animation

11. Types of waves
All waves transfer ________ by repeated _______________.
_______________waves—particles vibrate in an ________________motion while the energy moves across.
energy
vibrations
Transverse
up-and-down
Particles
Energy
rope example
slow motion

12. ___________ wave—the particles of the medium vibrate back and forth in the same direction the wave energy is moving.
____________ —part of a longitudinal wave where the particles are crowded (pressed) together. RAREFACTION: The part where the particles are spread apart.
Longitudinal
Compression
Particles & Energy

13. Wave animations http://www.youtube.com/watch?v=7cDAYFTXq3E

14. Properties of waves
Amplitude—(wave height) distance from the rest position to the crest or trough
Large amplitude=more energy
crest
rest position
trough

15. Wavelength —the distance from any point on a wave to an identical point on the next wave. (crest to crest, trough to trough, compression to compression, rarefaction to rarefaction) Shorter wavelength=more energy

16. Higher frequency= higher energy
Frequency —the number of _________ passing through an area in one _______, measured in _______ (Hz)
waves
second
Hertz
1 Hertz = 1 wave per second
5 waves in 1 second= 5 Hz
Higher frequency= higher energy
Wave speed— speed at which a wave travels =frequency x wavelength
Low frequency-few waves
Per second
Higher frequency—more
Waves per second
1 second

17. Wave property animations
Wave motion: change frequency, wavelength etc…
Characteristics of Waves: Amplitude, Wavelength and Frequency

18. Wave Interactions
Reflection
___________—when a wave _______ __ _ _ _____after hitting a barrier it can’t go through.
bounces
back
All types of waves can be reflected
Example: ______ —a reflected sound wave, sonar
echo
Light waves reflected off an object allow you to see it.
surface

19. White light bends to form a rainbow
_________—the ________ of light waves as they pass through from one medium to another at an angle.
Refraction
bending
When a wave passes from one medium to another, it’s speed and wavelength changes so it _________.
Examples:
White light bends to form a rainbow
bends

20. _________—the change in direction of a wave as it bends around a barrier or opening
Resonance—when two objects vibrate at the same frequency; one object causes _____________________.
Diffraction
another object to vibrate
interactive wave disturbance tutorial

21. A resonating object absorbs energy from the vibrating object and begins to vibrate too.
The 4 month old bridge collapsed during a windstorm with gusts that reached 68 km/h (42 mph). The catastrophe was attributed to faulty design. Instead of allowing the wind to pass through, the suspended girders caught the wind, causing the bridge to buck and roll. The bucking motion earned the bridge the nickname Galloping Gertie. The stronger the wind blew, the more violently the structure oscillated, until it finally broke apart and crashed into the water.

22. Label the wave parts 1 second 0 seconds Type of wave: Longitudinal
Frequency:
____ Hertz 3
wavelength
__________
amplitude
Type of wave:
Transverse
Frequency:
____ Hertz
__________
3.5
wavelength
___________

23. DRAW THIS CHART IN YOUR NOTEBOOK
Waves
Transverse
Longitudinal
Energy
Medium
Frequency
Amplitude
Wave speed
DRAW THIS CHART IN YOUR NOTEBOOK
wave simulator