1. Lesson link
What is efficiency?

2. Draw a line under last lesson’s work and write today’s title in your book...
26/11/2018
c/w
Features of Waves

3. Describe the difference between transverse and longitudinal
Learning Objectives
Developing Recall that waves transfer energy without transferring matter
Securing Define and use the terms wavelength, amplitude, frequency, period and wave velocity
Exceeding
Describe the difference between transverse and longitudinal

4. Engage
Under the title of ‘wave examples’ name as many types of wave that you can think of

5. Watch the demo/discussion. What is being transferred in both examples
Watch the demo/discussion. What is being transferred in both examples? Complete and fill in the following paragraph
When a ball is thrown, both ________and _________are transferred to the other person.
However, when the other person is spoken to, only ________ is transferred. This is because sound travels in _______ and these are only able to transfer ________.

6. Transverse = “Perpendicular”
There are two types of wave.
TRANSVERSE waves and LONGITUDINAL waves
When describing them, be specific! The definitions share a common phrase, they only differ with a single word!
A wave in which the vibrations of the wave move ________ to the wave direction
Transverse = “Perpendicular”
Longitudinal = “Parallel”
Write the definition for each wave, placing the relevant word in the gap!

7. In pairs discuss other examples of transverse waves.
“ A wave in which the vibrations move perpendicular to the wave direction”
Following the demonstration, provide an example of a transverse wave and explain how it represents one
In pairs discuss other examples of transverse waves.
Vibrations
Wave Direction
ransverse

8. Longitudinal = Parallel
Longitudinal Waves
“ A wave in which the vibrations move parallel to the wave direction”
Following the demonstration, provide an example of a transverse wave and explain how it represents one
In pairs discuss other examples of longitudinal waves
Longitudinal = Parallel

9. Wave pop quiz! Round 1: Easy Round 2: Medium Frequency Amplitude
Define the following words
Pitch
Volume
Oscillation
Match the scientific phrases with a definition. Write them in your notes
Round 2: Medium
Frequency
The maximum displacement (height) of a wave. It is the loudness of a wave
Amplitude
The time taken for one complete oscillation
Wave Velocity
The number of waves per second. It is the pitch of a wave
Period
The speed with a direction that the wave travels at
Round 3: Hard
Pick a musical instrument and explain how you could change the frequency and amplitude of the sound!

10. Explain: wave properties
Crest
Wavelength
Amplitude
Trough
Lower Frequency
Waves can be visualised using an oscilloscope. Draw the wave trace above as neatly as possible.
Label the properties shown
Higher Frequency

11. Explain: wave properties
Crest
Wavelength
Amplitude
Trough
Task 1: Label the time period and frequency of the wave
Task 2: Draw a wave with a) a higher frequency and b) a lower frequency
Task 3: Draw a a) louder wave and b) a quieter wave

12. Explain The speed of a wave is calculated by: Speed = distance time
  v = x t  
Distance must be in m
Time must be in s
Speed will be in m/s
If a wave carries a surfer 120m in 60 seconds, what is the speed of the wave?

13. Extend The speed of a wave is ALSO calculated by:
Speed  =  Frequency x  Wavelength
  v = f x λ  
A wave has a frequency of 2Hz and a wavelength of 8m, what is its speed?
Frequency must be in Hz
Wavelength must be in m.
Speed will be in m/s
A wave has a wavelength of 10m, and travels at 50m/s, what is its frequency?

14. Wave Practice Complete the worksheet “Wave Calculations”
Complete the worksheet “All about Waves”

15. Exam Practice
With use of examples describe the differences and similarities between transverse and longitudinal waves.
6 marks

16. Exam Corrections:
With use of examples describe the differences and similarities between transverse and longitudinal waves.
6 marks
Longitudinal and transverse waves both transfer energy without transferring matter. Longitudinal waves such as sound waves, have their vibrations moving parallel to the wave direction whereas transverse waves (such as light) have their vibrations move perpendicular to the wave direction. Longitudinal waves need particles to move so cannot travel in a vacuum.

17. Describe the difference between transverse and longitudinal
Learning Objectives
Developing Recall that waves transfer energy without transferring matter
Securing Define and use the terms wavelength, amplitude, frequency, period and wave velocity
Exceeding
Describe the difference between transverse and longitudinal

18. Independent Study