chemistry
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Physical Change | Any change that alters the form or appearance of a substance but doesn't change it into another substance.
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| Chemical Change | A change in matter that produces one or more new substances.
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| Reactants | Substances that undergo chemical changes.
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| Products | New substance or substances that are formed.
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| Precipitate | A solid that forms forms liquids during a chemical reaction.
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| Exothermic Reaction | The energy released as the product form is greater than the energy required to break bonds of the reactants.( usually heat)
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| Endothermic Reaction | More energy is required to break bonds of the reactants than is released by the formation of the products.
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| Chemical Equation | A way to show a chemical reaction, by using symbols instead of words.
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| Law of Conservation Of Mass | During a Chemical Reaction, matter is not created or destroyed.
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| Open System | Matter can enter from or escape to the surroundings.
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| Closed System | Matter doesn't leave or enter.
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| Coefficient | A number placed in front of a chemical formula in an equation.
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| Synthesis | When two or more elements or compounds combine to make a more complex substance.
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| Decoposition | Reacts when compounds break down into simpler products.
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| Replacement | If two elements in different compounds trade places.
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| Activation Energy | The minimum amount of energy needed to start a chemical reaction.
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| Concentration | The amount of a substance in a given volume.
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| Catalyst | Increases the rate by lowering the activation energy needed.
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| Enzymes | The cells in your body that contain thousands of biological catalysts.
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| Inhibitor | A material that us used to decrease the rate of chemical reactions.
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