7th Grade- Chapters 1-3 Chemical Interactions Book Test Review


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7th Grade- Chapters 1-3 Chemical Interactions Book Test Review

  1. 1. Chapters 1-3 Review Game
  2. 2. Compound <ul><li>A substance made of two or more elements chemically combined in a specific ratio, or proportion. </li></ul>
  3. 3. coefficients <ul><li>You can balance a chemical change by changing the </li></ul>
  4. 4. physical change <ul><li>A change that alters the form or appearance of a material but does not make the material into another substance. </li></ul>
  5. 5. Element <ul><li>A substance that cannot be broken down into any other substances by chemical or physical means. </li></ul>
  6. 6. chemical reaction <ul><li>The process in which substances undergo chemical changes that results in the formation of new substances. </li></ul>
  7. 7. pH scale <ul><li>shows concentration of hydrogen ions in a solution </li></ul>
  8. 8. chemical change <ul><li>A change in matter that produces a new substance. </li></ul>
  9. 9. solubility <ul><li>Measure of how much solute can dissolve in a solvent at a given temperature </li></ul>
  10. 10. Solution <ul><li>A well-mixed mixture. </li></ul>
  11. 11. mixture <ul><li>Two or more substances that are mixed together but not chemically combined. </li></ul>
  12. 12. Molecule <ul><li>combination of two or more atoms. </li></ul>
  13. 13. Chemical formula <ul><li>A combination of the symbols that represent the elements in a compound. </li></ul>
  14. 14. chemical change <ul><li>A change in matter that produces a new substance. </li></ul>
  15. 15. Chemical Bond <ul><li>The force that holds atoms together. </li></ul>
  16. 16. Atom <ul><li>smallest particle of an element. </li></ul>
  17. 17. Chemical Symbol <ul><li>A one or two letter set of characters that is used to identify elements. </li></ul>
  18. 18. Precipitate <ul><li>A solid that forms from a solution during a chemical reaction. </li></ul>
  19. 19. Chemical Equation <ul><li>A short, easy way to show chemical reactions, using symbols instead of words. </li></ul>
  20. 20. neutralization <ul><li>Reaction between an acid and a base producing water and a salt </li></ul>
  21. 21. Unsaturated <ul><li>If you can continue to dissolve more solute in a solution, you have a(n) ________ solution. </li></ul>
  22. 22. Conservation of mass <ul><li>The principle stating that matter is not created or destroyed during a chemical reaction. </li></ul>
  23. 23. Chemistry <ul><li>The study of the properties of matter and how matter changes. </li></ul>
  24. 24. solute <ul><li>The part of a solution that is present in the smaller amount </li></ul>
  25. 25. Subscript H 2 0 <ul><li>A number in a chemical formula that tells the number of the atoms in a molecule or the ratio of the elements in a compound. </li></ul>
  26. 26. suspension <ul><li>mixture in which particles can be seen & easily separated by settling or filtration </li></ul>
  27. 27. Covalent bond <ul><li>Chemical bond formed when two atoms share electrons </li></ul>
  28. 28. Synthesis <ul><li>A chemical reaction in which two or more simple substances combine to form a new, more complex substance. </li></ul>
  29. 29. Products <ul><li>A substance formed as a result of a chemical reaction. </li></ul>
  30. 30. Reactants <ul><li>A substance that enters into a chemical reaction. </li></ul>
  31. 31. Coefficient <ul><li>A number in front of a chemical formula in an equation that indicates how many molecules or atoms of each reactant and product are involved in a reaction. </li></ul>
  32. 32. Concentration <ul><li>The amount of one material in a volume of another material. </li></ul>
  33. 33. Activation energy <ul><li>The minimum amount of energy that has to be added to get a chemical reaction started. </li></ul>
  34. 34. Replacement reaction <ul><li>A reaction in which one element replaces another in a compound; or when two elements in different compounds trade places. </li></ul>
  35. 35. Indicator <ul><li>A compound that changes color when it comes in contact with an acid or a base </li></ul>
  36. 36. Exothermic reaction <ul><li>A reaction that releases energy in the form of heat. </li></ul>
  37. 37. decomposition <ul><li>A chemical reaction that breaks down compounds into simpler products. </li></ul>
  38. 38. Enzyme <ul><li>A biological catalyst that lowers the activation energy of reactions in cells. </li></ul>
  39. 39. Endothermic reaction <ul><li>A reaction that absorbs energy in the form of heat. </li></ul>
  40. 40. Solvent <ul><li>The part of a solution that is present in the larger amount. </li></ul>
  41. 41. Fuel <ul><li>A material that releases energy when it burns. </li></ul>
  42. 42. Base #8-14 on the pH scale
  43. 43. Concentrated solution A mixture that has a lot of solute dissolved in it.
  44. 44. Solution <ul><li>A very well mixed mixture. </li></ul>
  45. 45. fire prevention best form of fire safety
  46. 46. acid A substance that turns blue litmus paper red.
  47. 47. Acid A substance that turns blue litmus paper red.
  48. 48. Inhibitor <ul><li>A material that decreases the rate of a chemical reaction. </li></ul>
  49. 49. base Feels slippery
  50. 50. Indicator <ul><li>A compound that changes color when it comes in contact with an acid or a base </li></ul>
  51. 51. salt Any ionic compound made from the neutralization of an acid with a base.
  52. 52. neutral 7 on the pH scale
  53. 53. atomic number number of protons in the nucleus of an atom
  54. 54. Acid #0-6 on the pH scale
  55. 55. catalyst <ul><li>A material that increases the rate of a chemical reaction by lowering the activation energy. </li></ul>
  56. 56. alloy <ul><li>Material made of 2 or more elements that has the properties of a metal </li></ul>
  57. 57. matter <ul><li>Anything that has mass and takes up space </li></ul>
  58. 58. Acid Tastes sour
  59. 59. Alkali metals Group 1
  60. 60. <ul><li>lower freezing point of solvent </li></ul><ul><li>raise boiling point of solvent </li></ul>2 effects of solutes on solutions
  61. 61. period row across the periodic table
  62. 62. Fuel, oxygen, heat 3 parts of the fire triangle
  63. 63. Noble gases Group 18
  64. 64. Combustion A rapid reaction between oxygen and fuel that results in fire.
  65. 65. Base A substance that turns red litmus paper blue.
  66. 66. Base Tastes bitter
  67. 67. digestion Process that breaks down complex molecules of food into smaller particles
  68. 68. group (or family) column on the periodic table
  69. 69. halogens <ul><li>Group 17 </li></ul>
  70. 70. malleable property that metal can be rolled into thin sheets or shapes
  71. 71. colloid mixture containing small, undissolved particles that do not settle out - particles large enough to scatter a beam of light
  72. 72. Dilute solution Mixture that has only a little solute
  73. 73. corrosive Eat away at other materials
  74. 74. ductile property that metal can be pulled into wire
  75. 75. hydrogen Element with 1 valence electron
  76. 76. Base A substance that turns red litmus paper blue.
  77. 77. Formation of a new substance Best evidence for a chemical reaction