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