1. What is a wave?
A periodic disturbance in a solid, liquid, or gas as energy is transmitted through a medium
What is a medium?
A physical environment in which phenomena occur (substance through which a wave can travel

2. 2 types of waves Transverse and longitudinal
Transverse-wave in which the particle of the medium move perpendicularly to the direction the wave is traveling
Longitudinal-wave in which particles of the medium vibrate parallel to the direction of wave motion

3. Parts of transverse wave:
Crest-highest point on transverse wave
Trough-lowest point between each crest
Amplitude-maximum distance that the particles of a wave’s medium vibrate from their rest position
Wavelength-distance from any point on a wave to an identical point on the next

4. Draw picture and label transverse wave

5. Write 3 things you learned about transverse waves today

6. Parts of longitudinal wave
Compressions –part of wave where particles are crowded
Rarefaction-part of wave where particles are spread apart
Wavelength-same as transverse (compression to compression or rarefaction to rarefaction)

7. Properties of Waves Larger amplitude = more energy
You must work harder to make a wave with higher crests
Shorter wavelength = More energy
Shorter wavelength means crests are closer
Higher frequency = more energy
Frequency is the number of waves produced in a given amount of time

8. Electromagnetic Waves
Electromagnetic waves do not need a medium
All electromagnetic waves are transverse waves
Examples:
Visible light
Microwave ovens
TV signals
Radio signals
X rays

9. Mechanical Waves
-Waves that need a medium are called mechanical waves.
-In mechanical waves, when a particle vibrates, it pass energy to the next particle which passes energy to the next.
Examples of mechanical waves:
-sound waves (longitudinal wave)
-ocean waves
-seismic waves
What is the medium for each of these examples?

10. Wave Speed Speed at which a wave travels V = λ x f V=wave speed
λ =wavelength
F=frequency