Top 10 pressure demos and videos for the new GCSE
As I have started to teach the new AQA GCSE (2018) specification I thought I would share some of the demonstrations I have used to help explain the topics. As a non-specialist physics teacher, I felt the teacher specification could have explained what the students need to cover in more detai. I broke the spec down into various lessons. This series of lessons were taught with top set Y9 triple science, due to this reason I decided to use the true gas law names, these were not made explicit in the spec only the relationships. Some of the following may not be exactly true to the gas law however I believe they act as good models.
1) What is pressure? Recap from KS3 (flipped learning/ H/W to watch this video), P=F/A. Modelling what is happening when we blow a balloon up?
2) Enquiry into increasing depth, increasing pressure. Modelled with a displacement can with various holes in the side. Focussing on weight not density. Looking at dams and submarines and how they cope with intense pressure. Converting degrees Celsius to Kelvin.
3) Summarising the two lessons above, embedding the idea of particles, energy, collisions and particles. Video – Physics of diving
7) Make sure graphs are correct with relationships clear. Get all students to explain what is happening to particles in each of the three gas laws, with diagrams. Work on the pV = constant. I will upload a #foldable I have created to support this.
8) Use online assessment – plickers/quick-key/kahoot to assess learners and address any misconceptions.
This goes into far more depth than specification allows but should stretch and challenge triple scientists. I am also aware, pressure also appears in another area of the specification (forces) other than the particle model of matter. This section deals with the harder equations and understanding of atmospheric pressure and fluid pressure.
How have others approached this?