| A | B |
|---|
| observation | information obtained directly from the senses |
| inference | a conclusion based upon observations; an interpretation |
| classification | the organization of objects, ideas or information into groups |
| instrument | a devise to make observations or measurements easier or more precise |
| cyclic change | a change that repeats itself |
| rate of change | how fast a change takes place |
| percent error | a method of comparing a measurement with the commonly accepted value of that measurement |
| measurement | an observation made with an instrument |
| water displacement | a method of determining the volume of an irregularly shaped object |
| mass | the quantity of matter in an object |
| length | the distance between two points |
| volume | the amount of space that matter occupies |
| density | the ratio between the mass and volume of an object |
