1. Physical Science Force
Waves
Physical Science Force

2. What is a Wave? A Wave is a _______________________
_________________________________.
Waves like water waves or crowd waves travel through a medium.
A medium is _______________________
____________________.
disturbance that carries energy through matter or space
a material through which a waves transfers energy

3. Wave parts
The distance between a point on one wave to the identical point on the next wave. λ
Wavelength = ___ = _________________ __________________________________________________
Frequency = ___ = ______________________ ____________________________________
Velocity = ___ = ______________________
The number of identical wave points that pass a place per second. f
The speed a wave travels. V
V = λ x f

4. Types of Waves There are two types of waves: _______________
transverse
compressional

5. Transverse Waves In transverse waves, the medium moves
__________________________________
__________
at right angles to the direction the wave travels.

6. Transverse Characteristics
Crest = ____________________
Trough = ____________________
Amplitude = _______________________ ______________
Highest point on a wave
Lowest point on a wave
Height of a wave from the rest position

7. Characteristics of Waves
rest position
crest
wavelength
amplitude
trough

8. Compressional Waves In compressional waves, the medium
________________________________
_______________
moves in the same direction that the wave travels.

9. Compressional Characteristics
Compressions = ____________________ _________________________________ _________
Rarefactions = _____________________
the crowded area in a wave where the medium is pushed together.
Less dense area of a wave.

10. So…uhh…what does all this have to do with waves?
In sound waves, the ___________ determines how loud the sound is and the ___________ determines the pitch of the sound.
amplitude
frequency
High Amplitude  Loud sound
High Frequency  High pitch sound

11. Resonance
Every object has a certain ____________ ____________ that it prefers to vibrate at.
When an object is vibrated at the natural frequency, the amplitude of vibration __________. This is called __________.
natural
frequency
increases
resonance

12. Examples of Sound Waves
300Hz Hz
400Hz Hz
500Hz Hz
800Hz Hz

13. Interference Interference is ______________________ _________________
There are two types of interference:
________________
when two waves combine to form a new wave.
constructive
destructive

14. Constructive Interference
Constructive interference is ___________ _________________________________ ____________________________
when the compressions of different waves arrive at the same place at the same time

15. Destructive Interference
Destructive interference is ____________ __________________________________ ________________________
when the compressions of one wave meet the rarefactions of another wave

16. What Interference sounds like?
400Hz and 401Hz
400Hz and 403Hz
400Hz and 405Hz
400Hz and 411Hz
400Hz and 450Hz