Greencastle-Antrim School District proudly puts Children First, and that philosophy guides every decision and every action across the district. Our children represent the future of our community, and we work hard to live up to our mission to create and provide opportunities for all students to become lifelong learners and productive citizens.
The two types of high explosives are Primary explosives, which are easily ignited or detonated and are very sensitive to heat and friction, and Secondary explosives, which are usually much less sensitive to heat and friction and they typically have to be ignited through the use of other explosive materials.
Vapors may be ignited rapidly when exposed to heat, spark, open flame or other source of ignition. When mixed. with air and exposed to an ignition source, flammable vapors can burn in the open or explode in confined spaces. Being heavier than air, vapors may travel long distances to an ignition source and flash back.