| A | B |
|---|
| observation | an interaction of one or more of the senses |
| instruments | improve our ability to observe and to make measurements that would otherwise be very inaccurate |
| inference | an interpretation of one or more observations |
| prediction | an inference based on observations that indicate what will happen in the future |
| classification | grouping of objects and events |
| measurements | a means of describing observations using numbers |
| time | the instant at which something happens or the period during which a change occurs |
| length | a measure of the distance between two points |
| mass | the amount of matter in an object |
| percent error | the expression of the percent or amount of error in a measurement |
| density | the quantity of material contained in a certain amount of space |
| formula for density | D=M/V |
| temperature at which water is most dense | 4 degrees celsius |
| effects of temperature | as temperature drops the object expands which makes it less dense |
| effects of pressure | as the pressure rises the object becomes less dense |
| change | occurance of an event |
| frame of reference | a basis of comparison |
| rate of change | how long a change takes to occur |
| cyclic change | a change that follows a pattern |
| interface | the boundary between different materials and systems |
| equilibrium | the balance between opposite forces |
| dynamic equilibrium | a balance between changes |
