What are three examples of a chemical changes?

What two plates collide to form the mid-Atlantic ridge? Which type of examination is limited to an affected body area or organ system? How does temperature affect base oil density? This type of metabolism requires the use of oxygen? Can a bad freeze plug cause water in oil? Is it possible for heterozygous parents of normal height to have only offspring with achondroplasia? What is 9 feet 2 in inches? What I describes rocks that were formed when molten rock cooled down? What is gabapention used for? Did they make a coin of Amerigo Vespucci? What statement most accurately describes the relative locations of the covalently bonded electrons in methane and ammonia? What is the nineteenth element in the periodic table of elements? How many years would the plate under the Pacific ocean take to move 36 inches? How did New York City prepare for Hurricane Sandy? Is sericulture ecofriendly process? Preparations are made for the nucleus to divide? Can you buy 50 kg on Scarface the game? What is the name for the effect that is produced when warm air near earth earths surface bends light rays? Where are hurrricanes born? What type of symmetry do polyps have?