Chemistry (rates and reactions)

• physical change


  changes affecting the form of a chemical substance, but not its chemical composition.
• chemical change


  change is material, forming a new substance with different chemical properties.
• Reactants

  When substances are reacting together in a chemical equation.
• Products

  The new chemical made after the chemical reaction is knowns as the product.
• Arrows

  The reaction itself is represented by an arrow that points to the products of the reaction.
• Exothermic Reaction


  Chemical reactions which release energy
• Endothermic reaction


  any chemical reaction which absorbs heat from its environment
• chemical word formulas

  a chemical reaction expressed in words rather than chemical formulas; should state the reactants, products, and direction of the reaction
• Chemical formula equation

  A chemical reaction expressed in chemical formulas of the reactants (on the left) and the products