This blog post here I explained the SoL that I made to follow the new GCSE pressure specification content. In the final lessons I wanted students students to further understand the relationships between the variables. It was then I decided to create another interactive element students could have in their books.
The PTV foldable isn’t a true foldable but it does move, which is good enough me.
The resource can be downloaded for free here on my TES site It needs to be cut out and the ‘T’ strip only needs to be stuck in books at the very top and bottom. The P – V strip just slides through the middle. Just cover one of the variables – P, T or V and by moving the paper strip the relationship becomes clear. By covering a variable it can be explained that this is the one that is kept constant.
Gay-Lussac’s Pressure Law
If you keep volume constant and move it so P is in the 10 o’clock position the relationship is that if you increase temperature you increase pressure.
If you keep pressure constant and move it so V is in the 2 o’clock position, the relationship is that if you increase temperature you increase the volume of the gas.
If you keep temperature constant and move it so P is in the 10 o’clock position, the relationship is that if you decrease pressure you increase the volume of the gas showing an inverse relationship.
Let me know if you use the resource how you find it.