Across
- 6. each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element
- 7. the rate of change of its position with respect to a frame of reference
- 10. the distance between identical points (adjacent crests) in the adjacent cycles of a waveform signal propagated
- 14. a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials
- 15. the electrical and magnetic forces or effects produced by an electric current
- 16. what you need to do work
- 17. a simple machine that you use a screwdriver for
- 18. the combination of two or more electromagnetic waveforms to form a resultant wave in which the displacement is either reinforced or canceled
- 19. solid liquid gas _
- 23. a set of principles on which the practice of an activity is based
- 24. never changing
- 25. a push or pull
- 27. a simple machine with a sloping surface
- 28. the point of melting
- 29. wave consisting of a periodic disturbance or vibration that takes place in the same direction as the advance of the wave
- 32. the point of boiling
- 35. a numerical measurement of how far apart objects or points are
- 38. a change in the direction of waves as they pass from one medium to another
- 39. the point of freezing
- 40. educated guess
- 44. point on a wave is the maximum value of upward displacement within a cycle
- 45. the energy transferred to or from an object via the application of force along a displacement
- 48. attraction or repulsion that arises between electrically charged particles because of their motion
- 50. a wheel and axle but with a rope
- 51. makes up everything
- 52. a simple machine containing a fulcrum
- 54. what are the things in the ocean that push to the beach on the surface
- 55. a region within a magnetic material in which the magnetization is in a uniform direction
- 61. a region in a longitudinal (sound) wave where the particles are closest together
- 62. a dynamo or similar machine for converting mechanical energy into electricity
- 63. solid _ gas plasma
- 64. a minute portion of matter
- 65. MA=Fo/F_
- 66. _'s laws
- 67. a measure of the amount of matter that an object contains
- 68. comprises a path along which the whole current flows through each component
- 70. the change in frequency of a wave in relation to an observer who is moving relative to the wave source
- 72. smallest unit of matter
- 74. solid liquid _ plasma
- 78. the charge of a electron
- 79. charge of a proton
- 83. the moving of something from its place or position
- 84. small _ large
- 86. positive charge
- 87. branches so that the current divides and only part of it flows through any branch
- 89. MA=F_/Fi
- 91. energy that comes from a source and travels through space at the speed of light
- 92. relating to, composed of, or using ions
- 94. distance/time
- 96. method scientists use
- 97. energy from the sun
- 98. what do you see in the mirror
- 99. another word for heat energy
Down
- 1. a covalently bonded set of two or more atoms
- 2. neutral charge
- 3. length*width*height
- 4. the process by which sound waves travel through a medium
- 5. the substances on a periodic table
- 8. substance made up of different elements joined together by a chemical bond
- 9. motion in which all points on a wave oscillate along paths at right angles to the direction of the wave's advance
- 11. positive, negative, and neutral _
- 12. a body of water or air moving in a definite direction, especially through a surrounding body of water or air in which there is less movement
- 13. negative charge
- 20. the rate of change of the velocity of an object with respect to time
- 21. the structure of an atom comprising a nucleus
- 22. another word for thermal energy
- 26. energy that produces light
- 30. when something is in movement
- 31. column of periodic table
- 33. an electromotive force or potential difference expressed in volts
- 34. motion
- 36. the transfer of thermal energy through the movement of a liquid or gas
- 37. the fact or phenomenon of light, radio waves, etc. being deflected in passing obliquely through the interface between one medium and another or through a medium of varying density
- 41. the process by which a beam of light or other system of waves is spread out as a result of passing through a narrow aperture or across an edge, typically accompanied by interference between the wave forms produced
- 42. result for trough wave
- 43. how dense an object is
- 45. a simple machine that is like a door stopper
- 46. what does a clock tell you?
- 47. class of physical attributes that are mediated by magnetic fields
- 49. the number of occurrences of a repeating event per unit of time
- 51. region at each end of a magnet where the external magnetic field is strongest
- 53. where is the protons and neutrons located
- 56. a group of two or more atoms
- 57. subtract this from the atomic number and you get the neutrons
- 58. the opposite of an unbalanced force
- 59. the ability not to be affected by something, especially adversely
- 60. another word for group
- 69. how heavy something is
- 71. a table with all of the elements
- 72. this tells you the amount of protons in an atom
- 73. a measure of the force amplification achieved by using a tool, mechanical device or machine system
- 75. energy that produces electricity
- 76. the opposite of a balanced force
- 77. safety in the lab
- 80. the maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position
- 81. a wave that is not capable of transmitting its energy through a vacuum
- 82. tools that make work more efficient
- 85. What is a trough in a wave?
- 88. highest surface part of a wave is called the crest, and the lowest part is
- 90. the resistance that one surface or object encounters when moving over another
- 93. a row of chemical elements
- 95. _ liquid gas plasma