Quarter 1 Vocabulary Review - 8th Grade

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Across
  1. 2. the region surrounding an atom's nucleus where one or more electrons are most likely to be found
  2. 3. a positively charged particle in the nucleus of an atom
  3. 5. the interaction between electric charges and magnets.
  4. 7. a substance made of two or more elements that are chemically joined in a specific combination
  5. 8. a push or a pull on an object.
  6. 9. when an object applies a force on another object, the second object applies a force of the same strength on the first object but the force is in the opposite direction.
  7. 12. a(n) ________ current is an electric current that continually flows in one direction.
  8. 13. a material through which electrons cannot easily move.
  9. 14. an atom that has a charge because it has gained or lost electrons
  10. 15. the gravitational force exerted on an object.
  11. 18. a(n) __________ circuit is complete and electric energy flows through the circuit.
  12. 20. a(n) __________ circuit that is not complete and no electric energy flows through the circuit.
  13. 26. magnetic ____________________stored energy due to the interactions of magnetic poles in a magnetic field.
  14. 27. a mixture in which the substances are not evenly mixed
  15. 30. an electric ________ is device that uses an electric current to produce motion.
  16. 31. a(n)____________ is an electric current that changes direction in a regular pattern.
  17. 32. the movement of electrically charged particles.
  18. 34. the transfer of charged particles between two conductors.
  19. 35. the number of protons in the nucleus of an atom of an element
  20. 37. the invisible region around a charged object where an electric force is applied.
  21. 39. an uncharged particle in the nucleus of an atom
  22. 40. region in a magnetic material in which the magnetic fields of the atoms all point in the same direction.
  23. 42. an object at rest will stay at rest, and an object in motion will stay in motion unless a force acts on the object.
  24. 44. a small particle that is the building block of matter
  25. 46. contact force that resists the sliding motion of two surfaces that are touching.
  26. 47. a magnet created by wrapping a current-carrying wire around a ferromagnetic core.
  27. 48. a measure of the distance an object travels in a given amount of time.
Down
  1. 1. an electric ____________ a device that uses a magnetic field to transfer mechanical energy to electric energy.
  2. 4. law that states that the acceleration of an object is equal to the net force exerted on the object divided by the object's mass.
  3. 6. a measure of the change in velocity during a period of time.
  4. 9. a(n) __________ force is the force that pushes perpendicular to the object's surface.
  5. 10. the region at the center of an atom that contains most of the mass of the atom
  6. 11. a push or a pull on one object by another object that is touching it.
  7. 16. charging an object without touching it.
  8. 17. two or more atoms that are held by chemical bonds and act as a unit
  9. 19. one of two or more atoms of an element having the same number of protons, but a different number of neutrons
  10. 21. matter that can vary in composition
  11. 22. matter with a composition that is always the same
  12. 23. an attractive force that exists between all objects that have mass.
  13. 24. the combination of all the forces acting on an object.
  14. 25. the speed and the direction of a moving object.
  15. 27. a mixture in which two or more substances are evenly mixed, but not bonded together
  16. 28. the place on a magnet where the force it exerts is the strongest.
  17. 29. an object that attracts iron and other materials that have magnetic qualities similar to iron.
  18. 33. a(n) __________ force is a force that one object applies to another object without touching it.
  19. 36. a negatively charged particle that occupies the space in a atom outside the nucleus
  20. 38. a substance made of only one kind of atom
  21. 41. a force of attraction or repulsion created by a magnet.
  22. 43. a region of space that has a physical quantity (such as a force) at every point.
  23. 45. the electrical potential energy difference between two places on an electric circuit.