| No. | Item | Definition |
|---|---|---|
| 1. | accuracy | closeness to the true value |
| 2. | acid | substance with sour reactive properties |
| 3. | adaptation | trait helping survival |
| 4. | analysis | careful examination of data |
| 5. | atom | smallest unit of an element |
| 6. | average | central value of numbers |
| 7. | bacteria | tiny single-celled organisms |
| 8. | balance | tool for measuring mass |
| 9. | base | substance opposite of an acid |
| 10. | beaker | container used in labs |
| 11. | calculate | work out by mathematics |
| 12. | cause | something that makes effects happen |
| 13. | cell | smallest unit of life |
| 14. | claim | statement that needs support |
| 15. | compare | examine similarities and differences |
| 16. | conclusion | final judgment from results |
| 17. | constant | factor kept the same |
| 18. | control | standard for comparison in testing |
| 19. | data | facts collected for analysis |
| 20. | decomposer | organism breaking down dead matter |
| 21. | density | mass per unit volume |
| 22. | dependent variable | factor measured in response |
| 23. | dissolve | mix evenly into a liquid |
| 24. | DNA | molecule carrying genetic information |
| 25. | effect | result produced by a cause |
| 26. | element | pure substance of one atom type |
| 27. | energy | ability to do work |
| 28. | equipment | tools used for experiments |
| 29. | estimate | rough calculation or judgment |
| 30. | evaporation | liquid changing to gas |
| 31. | evidence | information supporting a claim |
| 32. | experiment | a scientific test or procedure |
| 33. | fair test | test with controlled conditions |
| 34. | force | push or pull |
| 35. | fossil | preserved remains of ancient life |
| 36. | freezing | liquid changing to solid |
| 37. | frequency | number of cycles per second |
| 38. | friction | force resisting motion |
| 39. | function | job or purpose |
| 40. | gas | state that spreads out |
| 41. | graph | visual display of data |
| 42. | gravity | force pulling objects together |
| 43. | habitat | natural home of an organism |
| 44. | heat | thermal energy transfer |
| 45. | hypothesis | a testable proposed explanation |
| 46. | independent variable | factor intentionally changed |
| 47. | instrument | device for measuring or observing |
| 48. | law | statement describing a natural pattern |
| 49. | light | visible electromagnetic energy |
| 50. | liquid | state that flows |
| 51. | magnet | object producing magnetic force |
| 52. | mass | amount of matter |
| 53. | materials | items needed for the project |
| 54. | matter | anything with mass and volume |
| 55. | melting | solid changing to liquid |
| 56. | method | way of doing something |
| 57. | microscope | instrument for viewing tiny objects |
| 58. | mixture | combination without chemical bonding |
| 59. | model | representation of a real thing |
| 60. | molecule | group of bonded atoms |
| 61. | motion | change in position |
| 62. | nutrient | substance needed for growth |
| 63. | observation | information noticed and recorded |
| 64. | orbit | path around another object |
| 65. | organism | a living thing |
| 66. | pattern | repeated or regular arrangement |
| 67. | pH | measure of acidity or basicity |
| 68. | pipette | tool for transferring small liquid |
| 69. | population | members of one species |
| 70. | precision | closeness of repeated measurements |
| 71. | predict | say what may happen |
| 72. | procedure | ordered steps in an investigation |
| 73. | question | something to investigate scientifically |
| 74. | range | difference between highest and lowest |
| 75. | reaction | process forming new substances |
| 76. | research | careful study to discover facts |
| 77. | results | outcomes of an experiment |
| 78. | ruler | tool for measuring length |
| 79. | safety | freedom from danger or harm |
| 80. | sample | small part representing a whole |
| 81. | solid | state with fixed shape |
| 82. | solution | uniform mixture of substances |
| 83. | sound | vibrations heard by ears |
| 84. | specimen | sample used for study |
| 85. | speed | distance traveled per time |
| 86. | table | data arranged in rows |
| 87. | temperature | measure of heat level |
| 88. | test | try something to check it |
| 89. | theory | well-supported scientific explanation |
| 90. | thermometer | tool for measuring temperature |
| 91. | trend | general direction of change |
| 92. | trial | one run of an experiment |
| 93. | variable | a factor that can change |
| 94. | vibration | rapid back-and-forth motion |
| 95. | voltage | electrical push in a circuit |
| 96. | volume | amount of space occupied |
| 97. | wave | disturbance carrying energy |
| 98. | wavelength | distance between wave peaks |
| 99. | weather | short-term atmospheric conditions |
| 100. | weight | force of gravity on mass |
