question: Exposure to oxygen and water can cause iron to 
choices.text: decrease strength melt uncontrollable burning thermal expansion turn orange on the surface vibrate Extremes of temperature levitate
choices.label: A B C D E F G H
fact2: Iron rusts in the presence of oxygen and water.
combinedfact: In the presence of oxygen and water, iron will become orange on the surface
formatted_question: Exposure to oxygen and water can cause iron to  (A) decrease strength (B) melt (C) uncontrollable burning (D) thermal expansion (E) turn orange on the surface (F) vibrate (G) Extremes of temperature (H) levitate