| A | B |
| science | the knowledge obtained by observing natural events and conditions in order to discover facts and formulate laws or principles that can be verified or tested |
| empirical evidence | the observations, evidence, and other types of data that people gather and test to support and evaluate scientific explanations |
| pseudoscience | a process of investigation that in one or more ways resembles science but deviates from the scientific methods |
| 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 |
| variable | any factor that can change in an experiment, observation, or model |
| independent variable | in a scientific investigation, the factor that is deliberately manipulated |
| observation | the process of obtaining information by using the senses |
| data | information gathered by observing or experimentation that can be used in calculating or reasoning |
| dependent variable | in a scientific investigation, the factor that changes as a result of manipulation of one or more independent variables |
| hypothesis | a testable idea or explanation that leads to scientific investigation |
| control | the part of an experiment for which the independent variable has not changed: used as a way to determine the reliability and significance of the experiment results |