Physical Science

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