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Science vocab #2
Term | Definition |
---|---|
Chemical Reaction | a process that produces a chemical change |
Reactant | substances that exist before a reaction begins |
Product | substances that form as a result of chemical reactioin |
Chemical equation | a shorthand form that shows scientist at a glance the reactants, products, physical state, and the proportions of each substance |
Endothermic Reaction | reactions that absorb heat |
Activation energy | the amount of energy needed to start a reaction |
Rate of reaction | how fast a reaction occurs |
Catalyst | a substance that speeds up a chemical reaction |
Concentratioin | the amount of substance present in a certain volume |
Enzyme | catalyst that are large protein molecules that speed up or slow down reaction needed for cells to work properly |
Inhibitor | a substance that slows down a chemical reaction |
Law of conservation of Mass | mass is neither created or destroyed |
Exothermic reaction | reaction that releases heat |