Physical Science Final

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Across
  1. 1. A liquid substance capable of dissolving other substances
  2. 7. the formation of products from reactants
  3. 9. The product of an object's mass and velocity
  4. 12. a measure of the force exerted by a gas above a liquid
  5. 15. A combination of chemical symbols and numbers to represent a substance
  6. 16. horizontal row in the periodic table
  7. 19. a process that occurs when an unstable atomic nucleus changes into another more stable nucleus by emitting radiation
  8. 20. A change in matter that produces one or more new substances
  9. 23. positively charged ion (lost electrons)
  10. 28. The temperature at which a liquid changes to a gas
  11. 30. A chemical reaction in which energy is absorbed.
  12. 31. positively charged particle that determines the type of element
  13. 32. A negatively charged ion (gained electrons)
  14. 34. Distance and direction of an object's change in position from the starting point.
  15. 36. a type of collision in which the kinetic energy after the collision is less than the kinetic energy before the collision
  16. 39. A measure of the average energy of motion of the particles of a substance.
  17. 41. How readily a substance combines chemically with other substances.
  18. 43. The original chemical reactant in a radioactive decay equation which decays into daughter elements.
  19. 45. Electrons on the outermost energy level (shell) of an atom
  20. 46. Energy that is radiated or transmitted in the form of rays or waves or particles.
  21. 47. A liquid's resistance to flowing
  22. 49. Energy needed to get a reaction started
  23. 57. a push or pull on an object
  24. 58. A measurement of how much solute exists within a certain volume of solvent
  25. 59. the amount of matter in an object
  26. 60. substance that speeds up the rate of a chemical reaction by lowering activation energy
  27. 62. For a reaction to occur, the particles must collide, they must collide with the appropriate orientation, and they must collide with sufficient energy.
  28. 64. A device used to measure current in a circuit
  29. 65. forces of attraction between molecules
  30. 66. A substance made up of atoms of two or more different elements joined by chemical bonds
  31. 67. How far an object moves
  32. 70. Vertical column in the periodic table
  33. 71. one-half the distance between the nuclei of two atoms of the same element when the atoms are joined
  34. 72. Creation of energy by joining the nuclei of two atoms.
  35. 73. A quantity that has magnitude and direction
  36. 74. center of an atom contains protons and neutrons
  37. 75. Forces that produce a nonzero net force, causes acceleration
  38. 76. The measurement of the outer surface of an object.
  39. 77. length of time required for half of the radioactive atoms in a sample to decay
  40. 78. Zero net force causes constant velocity (can be at rest or moving)
  41. 79. A substance produced in a chemical reaction
Down
  1. 2. A pure substance made of only one kind of atom
  2. 3. A physical quantity that has magnitude only.
  3. 4. The tendency of an object to resist a change in motion
  4. 5. The splitting of an atomic nucleus to release energy.
  5. 6. unit of electric current
  6. 8. the process by which one or more substances change to produce one or more different substances
  7. 9. the amount of matter in an object
  8. 10. The temperature at which a solid becomes a liquid
  9. 11. the force of gravity on an object
  10. 13. The reaction that forms reactants from products.
  11. 14. A situation in which two objects in close contact exchange energy.
  12. 17. A chemical substance that is present at the start of a chemical reaction
  13. 18. Isotopes that have unstable nuclei and undergo radioactive decay.
  14. 21. The distance an object travels per unit of time
  15. 22. Chemical Reaction in which energy is given off, primarily in the form of heat
  16. 24. SI unit of force
  17. 25. A representation of a chemical reaction that uses symbols to show the relationship between the reactants and the products
  18. 26. small portion of matter
  19. 27. A change in a substance that does not involve a change in the identity of the substance
  20. 29. The overall force on an object when all the individual forces acting on it are added together
  21. 33. the ability of an atom to attract electrons when the atom is in a compound
  22. 35. one in which there is no net loss of total kinetic energy
  23. 37. When a stress is applied to a system at equilibrium, the equilibrium shifts to relieve the stress
  24. 38. A flow of electric charge.
  25. 40. How readily a substance combines chemically with other substances.
  26. 42. the speed and direction of a moving object
  27. 43. a change from one state (solid or liquid or gas) to another without a change in chemical composition
  28. 44. Change in velocity divided by the time it takes for the change to occur can be speeding up, slowing down, or changing direction
  29. 48. the force that acts on the surface of a liquid and that tends to minimize the area of the surface
  30. 50. the energy an object has due to its motion
  31. 51. the force that holds two atoms together
  32. 52. In a chemical reaction, the state in which the rate of the forward reaction equals the rate of the reverse reaction, so that the relative concentrations of the reactants and products do not change with time.
  33. 53. Every object in the universe attracts every other object
  34. 54. the change in concentration of a reactant or product per unit time
  35. 55. the powerful attractive force that binds protons and neutrons together in the nucleus
  36. 56. A substance that is dissolved in a solution.
  37. 61. a changing magnetic field creates an electric current
  38. 62. A substance made up of atoms of two or more different elements joined by chemical bonds
  39. 63. the number of protons in an atom
  40. 68. change in momentum
  41. 69. The chemical product in a radioactive decay equation produced from decayed parent elements.