| A | B |
|---|
| chemical reaction | process in which one or more substances undergo change to produce one or more different substances |
| chemical formula | notation used for a compound using symbols |
| subscript | number below and to the right of a symbol in a formula |
| chemical equation | description of a chemical reaction using formulas and symbols |
| reactants | starting materials in a chemical reaction |
| products | substances formed from a chemical reaction |
| coefficient | number in front of a symbol or formula |
| exothermic | reaction in which energy is given off |
| endothermic | reaction in which energy is absorbed |
| catalyst | substance that speeds up a reaction |
| inhibitor | substance that slows down a reaction |
| acid | substance with pH less than 7 |
| base | substance with pH greater than 7 |
| pH | scale used to measure a solution's ion concentration |
| salt | formed when an acid and base are neutralized |
| molecule | group of atoms held together by bonds |
| biochemicals | organic compounds made by living things |
| physical change | affects one or more physical properties of a substance |
| chemical change | when one or more substances are changed into new substances with different properties |
| organic compounds | compounds composed of carbon-based molecules |
| carbohydrates | biochemicals composed of one or more simple sugars bonded together and used for energy |
| proteins | biochemicals composed of amino acids |
| lipids | biochemicals that don't dissolve in water, such as waxes, fats and oils |
| nucleic acids | biochemicals that help build protein and made up of subunits called nucleotides |
| hydrocarbons | orgganic compounds made of only hydrogen and carbon |
| chemical bond | force of attraction that holds two atoms together |
| law of conservation of mass | states that mass is neither created or destroyed |
| law of conservation of energy | states energy is never created or destroyed |
