Beakman and Liza explain meterology and the history of barometers for understanding the weather. Beakman then explains that modern day weather stations are collecting data and combining that with weather satellites to get an idea of what the weather might be. Then he shows how to make a DIY barometer.
Cory and Shawn present their report on air pollution, in which they contend that the air density affects the performance of baseball teams during home games. This is because the air density affects the speed at which the ball travels through the air. They use the Colorado Rockies and the Philadelphia Phillies as examples: The Rockies average four more home runs per game because Colorado's air is much cleaner than Philadelphia's.