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 3 TIMES TITLING TABLE 1 AS 50% EFFORT, TABLE 2: 75 % EFFORT, TABLE 3 90% EFFORT LINE (DRAW THE LINES) DOES THE WAVELENGTH (INCREASE/ DECREASE) IS AMPLITUDE SIZE SMALL/BIG DOES FREQUENCY (INCREASE/ DECREASE) 1ST FROM 40CM TO 60CM 2ND FROM 20CM TO 80CM 3RD WHOLE METER

4. 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 ?

5. 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 -90 DEGREE ANGLE IN WAVE

6. 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

7. 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

8. 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

9. 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

10. 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.

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

12. 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

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

14. 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?

15. Review ● Please write down 3 things you learned today….