Quarter 1 Vocabulary Review - 8th Grade

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748
Across
  1. 5. a mixture in which the substances are not evenly mixed
  2. 6. the number of protons in the nucleus of an atom of an element
  3. 9. the region surrounding an atom's nucleus where one or more electrons are most likely to be found
  4. 10. the region at the center of an atom that contains most of the mass of the atom
  5. 11. a force of attraction or repulsion created by a magnet.
  6. 14. an object at rest will stay at rest, and an object in motion will stay in motion unless a force acts on the object.
  7. 16. a push or a pull on an object.
  8. 17. the gravitational force exerted on an object.
  9. 23. a material through which electrons cannot easily move.
  10. 25. a(n) __________ circuit that is not complete and no electric energy flows through the circuit.
  11. 28. an electric ________ is device that uses an electric current to produce motion.
  12. 29. the movement of electrically charged particles.
  13. 30. one of two or more atoms of an element having the same number of protons, but a different number of neutrons
  14. 32. a(n)____________ is an electric current that changes direction in a regular pattern.
  15. 33. a(n) __________ force is a force that one object applies to another object without touching it.
  16. 35. a negatively charged particle that occupies the space in a atom outside the nucleus
  17. 36. charging an object without touching it.
  18. 37. an atom that has a charge because it has gained or lost electrons
  19. 38. a(n) __________ circuit is complete and electric energy flows through the circuit.
  20. 39. an object that attracts iron and other materials that have magnetic qualities similar to iron.
  21. 40. a region of space that has a physical quantity (such as a force) at every point.
  22. 43. a positively charged particle in the nucleus of an atom
  23. 44. a small particle that is the building block of matter
  24. 45. matter with a composition that is always the same
  25. 46. 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.
  26. 47. the combination of all the forces acting on an object.
  27. 48. the electrical potential energy difference between two places on an electric circuit.
Down
  1. 1. the place on a magnet where the force it exerts is the strongest.
  2. 2. the speed and the direction of a moving object.
  3. 3. a mixture in which two or more substances are evenly mixed, but not bonded together
  4. 4. a(n) ________ current is an electric current that continually flows in one direction.
  5. 7. two or more atoms that are held by chemical bonds and act as a unit
  6. 8. a substance made of only one kind of atom
  7. 12. a(n) __________ force is the force that pushes perpendicular to the object's surface.
  8. 13. matter that can vary in composition
  9. 15. a measure of the change in velocity during a period of time.
  10. 18. a magnet created by wrapping a current-carrying wire around a ferromagnetic core.
  11. 19. region in a magnetic material in which the magnetic fields of the atoms all point in the same direction.
  12. 20. an electric ____________ a device that uses a magnetic field to transfer mechanical energy to electric energy.
  13. 21. contact force that resists the sliding motion of two surfaces that are touching.
  14. 22. a substance made of two or more elements that are chemically joined in a specific combination
  15. 23. the interaction between electric charges and magnets.
  16. 24. an uncharged particle in the nucleus of an atom
  17. 26. the invisible region around a charged object where an electric force is applied.
  18. 27. the transfer of charged particles between two conductors.
  19. 31. a measure of the distance an object travels in a given amount of time.
  20. 34. 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.
  21. 41. a push or a pull on one object by another object that is touching it.
  22. 42. an attractive force that exists between all objects that have mass.