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TUCSON - Middle school students at St. Gregory College Preparatory School will launch hot air balloons they created tomorrow, from 7 to 8 a.m.

The balloons are made of lightweight tissue paper and are held together by glue stick and tape. The launch will help the students learn more about kinetic molecular theory.

"We are going to connect the balloons to kinetic molecular theory and show why hot air rises from the point of view of the particles of air," said Jeffrey Decker, middle school science teacher.

The young engineers have spent the last few weeks studying the theory and designing and creating their balloons.

The balloons will be launched on the middle school soccer field at the school, 3231 N. Craycroft Road. For best results, they will be launched in the chilly morning air.

St. Gregory is an independent school for students in grades six through twelve, with no religious affiliation.