10 May 2006
JL conducted lessons for 3E Pure Physics on Pressure. Video clips were used showing experiments using a vacuum pump and a bell jar to demonstrate the effect of pressure changes on:
1. a partially blown balloon,
2. a partially "crushed" empty plastic bottle and
3. a beaker of hot water.
On given worksheets, students described what they observe via the video clips and attempted to explain the phenomena based on their knowledge of pressure concepts. A subsequent lesson discussion on concepts of pressure differences and effects was done.