Rosa Parks' arrest on this day in 1955 sparked the Montgomery Bus Boycott and changed the world. On Dec. 1, Rosa Parks refused to give up her seat on a Montgomery bus
Fire is a chemical reaction that gives off light and heat. It is an example of the chemical process of oxidation.
Scientists define combustion (what we call burning) as a reaction between a fuel, such as natural gas, oil, or wood, with an oxidant compound, such as oxygen. Combustion creates both heat and light. We can easily feel the heat from combustion, and we can see the emitted light in the form of flames.