\[\textrm{O}_{2}\textrm{(g)} + \textrm{N}_{2}\textrm{(g)} â 2\textrm{NO (g)}\]. If you take a match and just hold it or wave it around in the air, the match will not light. You have to strike the match against the side of the box. All chemical reactions need something that makes them start going.
Square Deal Facts about the Square Deal for kids and schools Summary of the Square Deal in US history The Square Deal, a major event in US history Theodore Roosevelt from September 14, 1901 to March 4, 1909 Fast, fun facts about the Square Deal Foreign & Domestic policies of President Theodore Roosevelt Theodore Roosevelt Presidency and Square Deal for schools, homework, kids and children
Chicago Board of Trade. The Chicago Board of Trade (CBOT), established on April 3, 1848, is one of the world's oldest futures and options exchanges. More than 50 different options and futures contracts are traded by over 3,600 CBOT members through open outcry and electronic trading. Volumes at the exchange in 2003 were a record breaking 454 million contracts.