1. Oxidation. The combination of a substance with oxygen. A reaction in which the atoms in an element lose electrons and the valence of the element is correspondingly increased. 2. Heat of combustion. The excess energy liberated as heat and also light many times during oxidation. 3. Exothermic. Reactions such as heat of combustion, with such things as methane. Endothermic: When something needs more energy then what is liberated. 4. Ignition temperature. The heat necessary for the initial action …showed first 75 words of 297 total…

…showed last 75 words of 297 total…in some cases. When arson is suspected 3 quarts of ash and soot are collected at what is believed to be the point of origin. It is identified according to how flammable it is, and what chance it was in being used to start and continue the fire. The evidence is collected in metal jars with lids. It is analyzed by testing out similar chemicals in similar fire conditions seeing if similar residues are left behind.