Quizlet 7th grade science

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  1. adrenals: located just aboce the kidneys; produce hormone that regulates blood sugar level
  2. air pollution: something that affects lungs eyes hearts
  3. anemometer: messures wind speed
  4. association neurons: connects sensory and motor neurons
  5. atmosphere: a blanket of air that surounds the earth
  6. atmosphereic pressure: the measure of air molecules pressing down on a specific point
  7. atom: a building block of matter
  8. atomic number: the number of protons
  9. behavior: how a person acts
  10. brain: major control center for your nervous system
  11. burning fossil fuels: cause of haze
  12. central nervous system: consists of the brain and spinal cord
  13. cerebellum: located behind and below the cerebrum; it maintains the body's sense of balance and coordinates muscular activity
  14. cerebrum: largest part of the brain, thinking and awareness originate here; also some voluntary movement; located in upper part of the head
  15. chemical: a kind of property that determines how a substance reacts to form other substances
  16. compound: a substance made of two or more elements whose atoms ore chemically combined
  17. conduction: the transfer of energy through actual contact of molecules
  18. convection: transfer of energy due to difference in density
  19. coriolis effect: an apparent force caused by earth's rotation that deflects winds
  20. coriolis effect: makes the wind from the poles go left or right, avoinding the equator
  21. doldrums: nearly windless zone near the equator
  22. electron: a negativly charged atom
  23. element: a substance made of just one type of atom
  24. endocrine system: made of ductless glands that produce hormones
  25. exhaust from cars, emissions from coal-burning power plants, and emissions from airplanes: causes of acid rain
  26. formula: a list of the elements in a compound in exact ratios
  27. ganglion: a relay station for autonomic nerves
  28. green house effect: process by which heat is trapped by gasses in earth's atmophere
  29. ion: an atom or group of atoms that has gained or lost an electron
  30. ionosphere: part of the thermosphere
  31. mass number: the number of protons and neutrons in an atom
  32. medulla: located at base of scull; controls breathing, heartbeat, muscular action OF THE DIGESTIVE TRACT
  33. mesosphere: second to last lair of atmoshpere
  34. mixture: a combination of substances fromed without a chemical reaction
  35. molecule: a particle that forms when atoms of some elements share electrons
  36. motor neurons: cells that carry messages from the central nervous system to specific body organs
  37. mountains: sometimes blocks air circulation
  38. nerves: cells that carry messages throughout the nervous system
  39. neutron: an atomic particle that has no electrical charge
  40. nitrogen and oxygen: two most abundent gasses in earths atomosohere
  41. nitrogen compounds: heat from burning fossil feuls
  42. nucleus: the core of an atom
  43. ozone: a reaction of sunlight with waste gases
  44. pancreas: produces insulin
  45. periodic table: a table in which all of the elements are orginized into
  46. peripheral nervous system: carries impulses to all parts of the body
  47. pH scale: a scale that measures the strenght of an acid can be obtained using
  48. photochemical: brown smog formed with the aid of light
  49. physical: a kind of property that may be abserved without changing the chemical composition
  50. pituitary gland: the master gland; located at the base of brain
  51. polar easterlies: cold, dry winds located between about 60 and 90 north nd south latitudes
  52. prevailing westerlies: winds responsible for much of the movement of weathere across the United States
  53. proton: a positivly charged atom
  54. radiation: the transfer of energy by waves
  55. reflex: is always involuntary
  56. smog: combination of smoke and fog
  57. solute: the substancebeing dissolved in a solution
  58. solution: a homogeneous mixture
  59. solvent: the substance in which a solute is dissolved
  60. spinal cord: thick bundle of nerves extending from brain through back bone
  61. stratosphere: middle lair of atmosphere
  62. substance: a kindof matter that is always the same in composition
  63. sulfuric acid: the combination of acid rain and emissions from coal furning power plants that combine with moistuere
  64. sulfurous smog: creation of burning fossil feuls in power plants
  65. suspension: a heterogenous mixture in which the particles of one material are wupposrted in a liquid
  66. synapse: space between two neurons
  67. thermosphere: highest lair of atmosphere
  68. thyroid: main gland that regulates metabolism
  69. trade winds: winds blowing toward the equatorthat force air in the doldrums aloft
  70. tropopause: second lair of atmosphere
  71. troposphere: lowest lair of atmoshpere
  72. two ways to list elements: atomic number, and atomic sturcture
  73. using less electricity: a way to support the Clean Air Act
  74. using public transportation: a way for individuals to improve air quatility
  75. using scrubbers: one way to control air poolution
  76. wind: the movement of air from one place to another because of difference in air pressure
  77. wind farm: clusters of wind turbines wsed to generate electricity
  78. wind turbine: a windmill connected to a generator that produces elecricity
  79. wind vane: indicates wind direction