sentence: Combustion is used in many ways.
sentences_before: When an object or something burns or combusts, oxygen combines with another substance and releases heat and light. For instance, when you burn wood, the oxygen in air combines with the wood to create fire. This ability of oxygen has many uses. But, it also makes pure-oxygen very dangerous. If pure oxygen touches a flame or spark, it can combust and cause great damage.
sentences_after: For example, when oxygen is mixed with acetylene, it can create a very hot flame. The hot flame is used in welding, where metal is heated and melted together. Also, oxygen is used to create powerful fuels, which also can be used in rockets and jets.
concept_name: combustion
headings: Oxygen Uses of oxygen
categories: Nonmetals