2Bell WorkName two ways you can apply force to a soccer ball.Name two ways the force you apply can change the motion of the soccer ball.
3W, S, L VocabWave – a disturbance that transfers energy from one place to anotherMedium – any substance that a wave moves throughMechanical wave – waves that transfer energy through matter
41.1 Vocab Cont.Transverse wave – a wave that travels in a perpendicular direction to its disturbanceLongitudinal wave – a wave travels in the same direction as its disturbance
5Bell Work What is a mechanical wave? What is a transverse wave? What is a longitudinal wave?
6Bell Work Fill in the chart like a Venn Diagram Longitudinal Wave Both Transverse Wave
7Crest – the highest point, or peak, of a wave 1.2 VocabCrest – the highest point, or peak, of a waveTrough – the lowest point, or valley, of a wave
81.2 Vocab ContinuedAmplitude – the distance a medium moves above or below its trough or crestWavelength – the distance from one crest or trough to the nextFrequency – the number of waves passing a fixed point in a certain amount of time
9Bell Work Describe how forces start waves. Does water moving through a hose qualify as a wave? Explain why or why not.
10Bell workMake a simple diagram of a wave – label crest, trough, amplitude, and wavelength.
11Bell WorkGet out a pencil and put everything else away. Then, grab a sheet from Justis and answer the true/false questions on the front.
12Bell WorkHow could you measure each of these things? What problems might you encounter in doing so?Width of a door openingVolume of liquidLength of time
13Bell WorkWhat is a medium?Give 3 examples of mediums.
14Wave LabPurpose: How can a transverse wave and a longitudinal wave be demonstrated?
15Bell Work Explain how to make a wave with a rope. Explain how to make a wave with a slinky.
16When you look in a mirror what are you seeing? Bell WorkWhen you look in a mirror what are you seeing?What are some examples of waves?
17Notes 1.3Reflection – the bouncing back of a wave after it strikes a barrier
18ReflectionAny type of wave can be reflected. We will look at the reflection of Sound, Water and Light Waves. Reflection best occurs from flat, hard surfaces. After reflection, a wave has the same speed, frequency and wavelength, it is only the direction of the wave that has changed.
19Refraction – the bending of a wave as it enters a new medium at an angle other than 90 degrees
20RefractionAny type of wave can be refracted, which means a change of direction. We will look at the refraction of Water Waves, Light Waves and Waves from Earthquakes.Refraction can occur when the speed of a wave changes, as it moves from one environment to another. After refraction, the wave has the same frequency but a different speed, wavelength and direction.When a wave enters a new environment, its change in speed will also change its wavelength (see the definition of wavelength).
21Diffraction – the spreading out of waves through an opening or around the edge of an obstacle
22DiffractionAny type of wave can be diffracted. A diffracted wave will "spread out". Diffraction occurs when the wavelength of a wave is of a similar size to an obstacle or a gap in a barrier.After diffraction, a wave will have the same speed, frequency and wavelength.
23Interference – the meeting and combining of waves
24Bell Work What is reflection? Give an example of reflection. What is refraction?Give an example of refraction.
25Bell Work What is diffraction? Give an example of diffraction. What is interference?Give an example of interference.
26Bell Work What is an echo an example of? What do all waves travel through?What is the amplitude measuring?
27Bell WorkChoose a type of wave that we made during the wave lab in class. Draw a small picture of the wave that was made and describe what type of wave it was and how the wave was made. Show in the picture the direction of disturbance and direction of the wave. Be sure to include how you know whether it is a transverse or a longitudinal wave.