Science Exams 13

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Elitewave3
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193021
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Science Exams 13
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2013-01-15 17:42:46
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Science Exams 13
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Science Exams 13
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  1. The study of the properties of matter and how matter changes?
    Chemistry
  2. A substance that cannot be broken down into any other substances by chemical or physical means.
    Element
  3. A substance made of two or more elements chemically combined in a specific ratio or proportion
    Compound
  4. Two or moresubstances that are mixed together but not chemically combined
    Mixture
  5. A well mixed mixture
    Solution
  6. Achange that alters the form or appearance of a material but does not make the material into another substance
    Physical Change
  7. A change in matter that produces a new substance
    Chemical Change
  8. Evidence of Chemical Reactions
    Color Change, precipitate, gas production (or bubbles), changes in temperature, changing in properties (the form from sloid,liquid,or gas.
  9. The smallest particle of an element
    Atom
  10. A particle made up of two or more atoms bonded together.
    Molecule
  11. The force that holds atoms together
    Chemical Bonds
  12. The process in which substances undergo chemical changes that results in the formation of new substances
    Chemical Reaction
  13. A solid that forms from a solution during a chemical reaction.
    Precipitate
  14. A short, easy way to show a chemical reaction, using symbols instead of words.
    Chemical Equation
  15. A combination of symbols that represent the element in a compound
    Chemical Formula
  16. One or two letter set used to identify an element
    Symbol
  17. The materials you have before a reaction
    Reactants
  18. The different materials you have after the reaction.
    Products
  19. Smaller number to the right of a chemical symbol, it shows the number of atoms of the element it follows, or the ratio, of elements in a compound
    Subscript
  20. A substance that enters into a chemical reaction
    Reactant
  21. Two or more substances combine to make a more complex substance
    Synthesis
  22. Breaks down compounds into simpler products
    Decomposition
  23. When one element replaces another in a compound, or when two elements in different compounds trade places
    Replacement
  24. The amount of one material in a certain volume of another material
    Concentration
  25. A material that increases the rate of a chemical reaction by lowering he activation energy
    Catalysts
  26. A material that decreases the rate of a reaction
    Inhibitors
  27. The three things that are necessary to start and maintain a fire fuel, oxygen, and heat.
    Fire Triangle
  28. The three parts of a fire triangle
    • Fuel
    • Oxygen
    • Heat
  29. A rapid reaction between oxygen and fuel that results in a fire
    Combustion
  30. To control a fire you remove one element in the fir etriangle.
    Controlling fire

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