| A | B |
|---|
| Controlled experiment | only one variable is deliberately changed at a time |
| Data | observations that have been organized for analysis |
| Hypothesis | a proposed answer to a question |
| Fact | knowledge or information based on real occurances. |
| Theory | a widely accepted group of facts and principles that explains why nature behaves the way it does |
| Model | a description of a theory or phenomenon that accounts for its known or inferred properties |
| Independent variable | a manipulated variable in an experiment |
| Dependent variable | a variable in an experiment whose changes are determined by the presence of another variable |
| Graph | a visual display of data used to identify trends or relationships |
| Law or principle | a summary of many experimental results that have been supported over time |
