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  • Boy Meets World: Air Pollution Presentation

    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.

  • Beakman's World: Air Density

    Beakman creates a paper spiral that hangs over a lamp and heats the air by turning the lamp on. When this happens, the hot air is less dense and starts to rise causing the spiral to spin.

  • Beakman's World: Different Densities

    Beakman explains density by weighing out different volumes of different items. He then shows how a balloon filled with helium is less dense than one filled with our own air so therefore it rises.

  • Beakman's World: The Weight of Gas

    Beakman weighs a slightly deflated basketball, pumps it up with air, and weighs it again to prove that air has weight. He explains that different gases have different densities, and to demonstrate this, he uses two shopping bags hanging from opposite ends of a suspended stick. He uses a pitcher to collect CO2 gas coming off of dry ice. When he pours the CO2 into one of the shopping bags, that bag's side of the balance goes down, illustrating that CO2 is denser than air and that different gases have different densities.