| A | B |
|---|
| Categoric | A type of variable eg metals |
| Continous | A type of variable using numbers |
| Control | A variable which must be kept constant. |
| Discrete | A variable that is always whole numbers |
| Ordered | A variable that can be ranked eg medium large |
| Fair test | Where only one thing is changed in the experiment |
| Data | A collection of measurements |
| Accurate | Close to the true value |
| Precise | Measurements taken using a smaller scale |
| Reliable | More measurements mean more reliable |
| Random | Readings that are incorrect by different amounts |
| Systematic | Readings that are incorrect by the same amount each time |
| False Zero | A type of systematic error due to an instrument fault |
| Evidence | Data that has been checked and analysed |
| Validity | Data only valid if they are affected by one thing |
| Calibration | Checking an instrument by taking readings |
