Students place 1 book at a time on the top block to increase the pressure of air in a calibrated syringe and measure the new volume each time. Plotting volume as a function of pressure illustrates Boyle's Law. To study Charles' Law, students submerge the air-tight syringe in water and measure the air's volume at different water temperatures. A plot of volume against temperature illustrates Charles' Law. Lesson concludes by deriving the Ideal Gas Law from Boyle's and Charles' Laws.