Unit 5 So Far

Unit 5 so far…

Yes, you must answer the
questions to receive credit

Plan for today

1.

Review Unit 5 - Quizizz lesson
a.

We might do these instead of Nearpods, depending on how glitchy/slow
they are

b.

Wave characteristics/properties

c.

Wave behavior

2.

Physics Story Time

​Learning goal: Distinguish between characteristics of a wave and the wave's behavior (reflection & refraction)

So far in Unit 5

Wave characteristics

●Wavelength (𝝺)

●Amplitude

○Crests - highest point

○Trough - lowest point

●Frequency

○Waves per second

○Units of Hertz (Hz)

So far in Unit 5

Calculating wave speed, wavelength or frequency

Equation:

v = 𝝺f

Remember:

𝝺 = v/f

𝝺 = wavelength

f = v/𝝺

f = frequency

V = wave speed or velocity

New this week: reflection and refraction

Reflection

●Wave bounces when it encounters a
new medium

●Does NOT travel through the medium

●ALL WAVES can reflect

Refraction

●Wave bends when it encounters a new
medium

●DOES travel through the medium, just at
a different angle

●ALL waves can refract, but it’s easier to
see than to hear

​This happens at the boundary between two media

Physics Story Time

Any school-appropriate topic

If you need to ask, it’s probably not appropriate.

Example on the next slide

Must have:

At least 7 sentences

3 examples of reflection (labelled)

3 examples of refraction (labelled)

Physics Story Time Example

George jumps into his time machine, He looks into the cold steel of his time machine and it looked back at him(reflection). He hops in and goes into the great unknown. When he lands, he is back in the park with his greatest enemy. He walks over the lake where his foe stands tall. You can see the terror in the eye of the duck through the water. (reflection) In a moment's notice the duck dashes away in the blink of an eye. Looking over in the pond he could see the fish at an angle.( refraction) He looks to his left and sees a fish hook sitting in the water (refraction) and he get an idea. He grabs the hook and throws it at the duck. It stuck him and George reeled him in. He dragged its body against the water. He could see the life in its eyes leave as it was dragged on the water, (refraction).  George gets back to his time machine. He sees the monster he has become (reflection)