MrBadmusSpring First Half

Year 8 · Spring First Half

Physics

6 lessons from 1 unit.

Unit P6 · lessons 1 to 6 of 9

Waves and sound

A wave carries energy across a room, an ocean or a steel girder and leaves everything where it found it. Follow that one idea from a bobbing buoy to a crack nobody can see.

  1. 01Waves on water: what a wave isModelA wave crosses a pond in seconds. Drop a cork in and it bobs a hundred times and stays exactly where you put it. Both of those are true at once, and the second one is the more useful.Open this lesson
  2. 02Transverse waves, reflection and superpositionModelTwo waves arrive at the same patch of water at the same moment. What does the surface do?Open this lesson
  3. 03How sound is madeProcessA guitar string, a loudspeaker cone and two folds of tissue in your throat all make sound. What do the three have in common?Open this lesson
  4. 04Sound is longitudinalContrastEvery drawing of sound you have ever seen was a wavy line. Almost none of them meant that the air goes up and down, and this lesson is about the difference.Open this lesson
  5. 05Frequency, pitch and loudnessQuantitativeTwo things can change about a note: how high it is and how loud it is. What sets each one?Open this lesson
  6. 06Sound needs a mediumInvestigationA buzzer rings inside a thick glass jar while a pump takes the air out. What happens to the sound, and why?Open this lesson

Back to all three sciences this half term The whole KS3 Physics course