1. Properties of Waves

2. COPY ON PAGE 16 IN SPIRAL JUMP ROPE LAB:
WHAT WILL HAPPEN TO A WAVE IF WE INCREASE THE DISTURBANCE ?
HYPOTHOSIS: ________________________________________________________________________________THEN________________________________________________.

3. COPY TABLE 1: LABEL “70% EFFORT”
LINE
(DRAW THE LINES)
DOES THE WAVELENGTH (INCREASE/DECREASE)
IS AMPLITUDE SIZE
Increase/Decrease
DOES FREQUENCY
(INCREASE/
DECREASE)
1ST FROM 40CM TO 60CM
2ND FROM 20CM TO 80CM
3RD WHOLE METER

4. COPY TABLE 2 : LABEL AS “50 % EFFORT”
LINE
(DRAW THE LINES)
DOES THE WAVELENGTH (INCREASE/DECREASE)
IS AMPLITUDE SIZE
Increase/Decrease
DOES FREQUENCY
(INCREASE/
DECREASE)
1ST FROM 40CM TO 60CM
2ND FROM 20CM TO 80CM
3RD WHOLE METER

5. COPY TABLE: LABEL AS “90% EFFORT’
LINE
(DRAW THE LINES)
DOES THE WAVELENGTH (INCREASE/DECREASE)
IS AMPLITUDE SIZE
Increase/Decrease
DOES FREQUENCY
(INCREASE/
DECREASE)
1ST FROM 40CM TO 60CM
2ND FROM 20CM TO 80CM
3RD WHOLE METER

6. COPY PAGE 17
CREATE A CLAIM BASED OFF YOUR DATA TABLE USING 3 PIECES OF EVIDENCE AND HYPOTHESES TO ANSWER THE FOLLOWING:
HOW DOES THE DISTURBANCE IN THE MEDIUM AFFECT THE WAVELENGTH, AMPLITUDE, AND FREQUENCY ?

7. SUBMIT TO JUPITER
TAKE A PICTURE OF ONE OF YOUR WAVES MADE IN LAB. OPEN THE PICTURE IN NOTABILITY AND IDENTIFY AND LABEL ALL THE PARTS OF THE WAVE.
INCLUDE THE WAVES:
-AMPLITUDE - WAVELENGTH TROUGH - CREST
- EQUILIBRIUM POINT DEGREE ANGLE IN WAVE

8. What exactly is a wave?
Wave: Any disturbance that can distribute and can transmit energy through matter or space.
Matter meaning liquids, gases, or solids
Other examples….
Radio waves
Analog or HD digital TV signals
Cellular reception
Microwave ovens
SONAR
Light waves from the sun
Crossfit ropes

9. Waves Carry Energy
Medium: solid, liquid, or gas through which waves can travel
Waves carry energy through the medium….not the medium carries the wave energy
Waves do work on everything in its path….
Ex. Waves at the beach
List 3 other examples

10. Types of Waves 3types Transverse Wave
Particles in the medium wave vibrate up and down
Transverse means moving across
Ex…crossfit ropes
Longitudinal Waves
Particles in the medium vibrate back and forth
Push on a spring
Compression: portions are tighter than normal
Rarefaction: particles are less crowded together

11. Amplitude
Amplitude: maximum distance a wave vibrates from its rest position
Rest position means neutral
Larger the amplitude, the taller the wave is
Larger Amplitude means more energy placed in to the wave.

12. Wavelength
Wavelength: distance between 2 adjacent crests or compressions in a series of waves.
Can also be measured on the trough of a wave

13. Frequency Frequency: Number of waves produced over a given time period
Waves can be counted by the number of crests or troughs that pass a point over a certain amount of time.
Directly related to a wave’s wavelength
Expressed in hertz (Hz). 1 Hz = 1/s
Higher frequency = more energy
Longer wavelength = less energy

14. Energy Transfer without a Medium
We are talking space
We cannot hear sound in space, because it needs a medium
Some waves travel MUCH faster in space
Examples
Light waves from the sun
List 2 more

15. Wave Speed Velocity = Wavelength X Frequency
Wave Speed: speed at which a wave travels
Speed of a wave depends on medium it is traveling through
Velocity = Wavelength X Frequency

16. WAVES AND MOVEMENT WHAT MAKES WAVES MOVE?
IF WE SHAKE A JUMP ROPE SIDE TO SIDE ON THE GROUND WHAT ARE YOU PUTTING INTO IT?
ARE WE DISTURBING THE ROPE?
HOW CAN WE DISTURB THE ROPE MORE?

17. Review
Please write down 3 things you learned today….