1. Energy: Waves
How does energy travel?

2. Get the sheet from the desk and answer the following question with a neighbor.
What does light, sound and earthquakes all have in common?
They transfer energy in the form of a wave.

3. What is wave motion?
A form of carrying energy

4. How does the motion of a wave begin?
Vibrations in materials set up wavelike disturbances that spread away from the source.

5. What is a medium?
Any substance that a wave travels through.

6. What are the two classes of waves?
MECHANICAL
Waves that travel through a medium
Ex. Sound and seismic waves
ELECTROMAGNETIC
Waves that do not need a medium to travel.
Ex. light, microwaves, x- rays

7. What are the parts of a wave?
Crest- highest point on a wave.
Troughs- lowest point on a wave.
Amplitude- the height from the line of origin to a crest or trough
Wavelength- distance between two corresponding points on a wave.

8. Diagram of a wave

9. What is frequency?
The number of waves that crosses a given point in a given time.
Measured in Hertz
Lowest Frequency
Highest Frequency

10. What is the speed of a wave?
Frequency x wavelength = wave speed

11. What is a transverse wave?
The motion of the medium is perpendicular to the motion of the wave.
ex light waves

12. What is a longitudinal wave?
The motion of the medium is parallel to the motion of a wave.
ex. sound waves

13. Human Wave Activity

14. http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/waves/generalwavesact.s html

15. What about Earthquakes?
Earthquakes are vibrations in the earth that release the (potential) energy stored in rocks.
Earthquakes create seismic waves.

16. Today we will be watching Bill Nye to learn more about Waves
Today we will be watching Bill Nye to learn more about Waves. Get the sheet from the desk. Begin the crossword puzzle on the back. You may use your notes. Also, get out your Venn diagram from yesterday for us to finish checking.

17. Day Three
Label the anatomy of the wave (yes you have to draw the wave)

18. Get the sheet from the desk
Get the sheet from the desk. Answer the following question with a neighbor.
Compare the two waves. Use the words frequency, wavelength and amplitude in your response.