A BUNCH OF HOT AIR











ABOVE: A balloon catches fire Friday during Jim Kaczynski’s annual balloon expo in the Lawn School parking lot. It was the only balloon that burned before taking flight.

ABOVE: A balloon catches fire Friday during Jim Kaczynski’s annual balloon expo in the Lawn School parking lot. It was the only balloon that burned before taking flight.

LEFT: Kaczynski, an eighth-grade science teacher at Lawn School, uses a wood stove to create the hot air.

LEFT: Kaczynski, an eighth-grade science teacher at Lawn School, uses a wood stove to create the hot air.

BELOW: Students gaze toward the sky during a colorful launch.

BELOW: Students gaze toward the sky during a colorful launch.

BOTTOM: Seventh-graders measure the angle of ascent. Students also measured for volume, mass and density, while calculating the flight time and height of each balloon.

BOTTOM: Seventh-graders measure the angle of ascent. Students also measured for volume, mass and density, while calculating the flight time and height of each balloon.