1. Honors Coordinated Science
What are waves?
Honors Coordinated Science

2. Warm up
Out of all these items what will most likely reflect visible waves of light.
Metal
A penny
A grape
A plant
a pencil
Name some different kinds of waves
What is the form of energy transferred by these waves?

3. What are waves?
A wave is a periodic (reoccurring at intervals of time) disturbance in a solid, liquid or gas as energy is transmitted through a medium.
A “medium” is the matter that the wave travels through.
Waves carry energy without carrying matter.

4. In water waves, water molecules bump each other and pass energy from molecule to molecule to create a wave.
Ball pass example.

5. Electromagnetic Waves
Waves that do not require matter to carry energy
These waves can use a medium to travel or they can travel through matter-less places such as space.
Example: x-ray, radio, infrared, ultraviolet.

6. Mechanical Waves Waves that use matter to transfer energy.
With out people would our ball representing energy be passed?
Example: Seismic waves from earthquakes, also sound waves
Is there sound in outer space?

7. Types of Mechanical Waves
Transverse Waves
The wave energy causes the matter in the medium to move up and down or back and forth at right angles to the direction the wave is traveling.
Compressional Waves
The wave energy moves forwards and backwards in the direction that the wave is traveling.

8. Create foldable on page 7

9. Sound Waves are Compressional Waves
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10. Amplitude
Amplitude: The measure of how high the crests are or how low the troughs are from the rest point in the middle.
The more energy the higher the amplitude
Example jump rope, Tsunami

11. Wavelength
The distance from the top of one crest to the top of the next.
Compressional: middle of one compression to the middle of another

12. Frequency
the number of wavelenghts that pass a given point in 1 second. The unit of measure is hertz. (Hz)
The smaller the frequency the greater the wave length
The larger the frequency the smaller the wave length.

13. Drawl a wave with a small frequency:
Drawl a wave with a large frequency:

14. How can we calculate the speed of a wave?
Wave Speed (V)=
frequency (f) X wavelength (lamda)
Units:
Wave speed = m/s
Wavelength = m
Frequency = HZ
The magic Triangle

15. Checking for Understanding
Wave Calculation questions