| A | B |
| empirical evidence | the observations, measurements, and other types of data that people gather and test to support and evaluate scientific explanations |
| law | a descriptive statement or equation that reliably predicts events under certain conditions |
| theory | a system of ideas that explains many related observations and is supported by a large body of evidence acquired through scientific investigation |
| experiment | an organized procedure to study something under controlled conditions |
| observation | the process of obtaining information by using the senses |
| hypothesis | a testable idea or explanation that leads to scientific investigation |
| independent variable | in a scientific investigation, the factor that is deliberately manipulated |
| dependent variable | in a scientific investigation, the factor that changes as a result of manipulation of one or more independent variables |
| data | information gathered by observation or experimentation that can be used in calculating or reasoning |