100 Words Every Science Fair Student Should Know
1. accuracycloseness to the true value2. acidsubstance with sour reactive properties3. adaptationtrait helping survival4. analysiscareful examination of data5. atomsmallest unit of an element6. averagecentral value. . .

1. accuracycloseness to the true value2. acidsubstance with sour reactive properties3. adaptationtrait helping survival4. analysiscareful examination of data5. atomsmallest unit of an element6. averagecentral value of numbers7. bacteriatiny single-celled organisms8. balancetool for measuring mass9. basesubstance opposite of an acid10. beakercontainer used in labs11. calculatework out by mathematics12. causesomething that makes effects happen13. cellsmallest unit of life14. claimstatement that needs support15. compareexamine similarities and differences16. conclusionfinal judgment from results17. constantfactor kept the same18. controlstandard for comparison in testing19. datafacts collected for analysis20. decomposerorganism breaking down dead matter21. densitymass per unit volume22. dependent variablefactor measured in response23. dissolvemix evenly into a liquid24. DNAmolecule carrying genetic information25. effectresult produced by a cause26. elementpure substance of one atom type27. energyability to do work28. equipmenttools used for experiments29. estimaterough calculation or judgment30. evaporationliquid changing to gas31. evidenceinformation supporting a claim32. experimenta scientific test or procedure33. fair testtest with controlled conditions34. forcepush or pull35. fossilpreserved remains of ancient life36. freezingliquid changing to solid37. frequencynumber of cycles per second38. frictionforce resisting motion39. functionjob or purpose40. gasstate that spreads out41. graphvisual display of data42. gravityforce pulling objects together43. habitatnatural home of an organism44. heatthermal energy transfer45. hypothesisa testable proposed explanation46. independent variablefactor intentionally changed47. instrumentdevice for measuring or observing48. lawstatement describing a natural pattern49. lightvisible electromagnetic energy50. liquidstate that flows51. magnetobject producing magnetic force52. massamount of matter53. materialsitems needed for the project54. matteranything with mass and volume55. meltingsolid changing to liquid56. methodway of doing something57. microscopeinstrument for viewing tiny objects58. mixturecombination without chemical bonding59. modelrepresentation of a real thing60. moleculegroup of bonded atoms61. motionchange in position62. nutrientsubstance needed for growth63. observationinformation noticed and recorded64. orbitpath around another object65. organisma living thing66. patternrepeated or regular arrangement67. pHmeasure of acidity or basicity68. pipettetool for transferring small liquid69. populationmembers of one species70. precisioncloseness of repeated measurements71. predictsay what may happen72. procedureordered steps in an investigation73. questionsomething to investigate scientifically74. rangedifference between highest and lowest75. reactionprocess forming new substances76. researchcareful study to discover facts77. resultsoutcomes of an experiment78. rulertool for measuring length79. safetyfreedom from danger or harm80. samplesmall part representing a whole81. solidstate with fixed shape82. solutionuniform mixture of substances83. soundvibrations heard by ears84. specimensample used for study85. speeddistance traveled per time86. tabledata arranged in rows87. temperaturemeasure of heat level88. testtry something to check it89. theorywell-supported scientific explanation90. thermometertool for measuring temperature91. trendgeneral direction of change92. trialone run of an experiment93. variablea factor that can change94. vibrationrapid back-and-forth motion95. voltageelectrical push in a circuit96. volumeamount of space occupied97. wavedisturbance carrying energy98. wavelengthdistance between wave peaks99. weathershort-term atmospheric conditions100. weightforce of gravity on mass