| A | B |
| constant | anything in an experiment that must be kept the same |
| conclusion | a decision based on an investigation and evidence |
| dependent variable | the factor in an experiment that changes as a result of the independent variable |
| experiment | a carefully planned activity done to help answer a question, test a hypothesis, or support an opinion |
| fair test | an experiment that tests one variable and keeps all other variables the same |
| hypothesis | a reasonable guess or possible explanation that can be tested |
| independent variable | a variable that is isolated for study in an experiment |
| inference | a conclusion based on partial data |
| observation | information gathered by the senses or through scientific measurement |
| investigstion | carefully done study to try to answer a question |
| prediction | an educated guess usually based on pstterns and other scientific data about what will happen in the future |