Magnesium ribbon will react in the presence of Oxygen to form Magnesium Oxide. Burning Magnesium produces a very bright reaction which liberates a substantial amount of heat energy, easily reaching temperatures of a few thousand degrees.
Due to its extremely high reaction temperature, Magnesium ribbon is commonly used as one of the preferred methods of igniting thermite and other reactions which have very high activation energies.
Magnesium ribbon can be ignited with relative ease using a simple butane lighter or Bunsen burner. Once ignited, the Magnesium ribbon will burn slowly but steadily down the length of the strand, leaving a flaky, white, Magnesium Oxide residue behind.