OUTCOME
By the end of the lesson you will recognise that a wave is a variation in energy through a medium. Be able to identify and apply wave properties. Recognise sound when represented at variations in pressure.
Engage
Sound is caused variations in a medium. In air a sound wave can be described by the periodic displacement of air particles around a central position. The oscillation is measured using amplitude, period, frequency and wavelength
LEARNING TASKS
Explain
What is an oscillation is?
What is the difference between period and frequency?
What is the difference between period and wavelength?
In the video what do they call a rarefaction?
Evaluate
Make sure you complete all of the questions from the practical activities
Ex. 9.2
PDQs 1.1-1.3
Reading for next class: p.427- 431