| A | B |
|---|
| test variable | a variable (often denoted by x ) that is held constant in an attempt to clarify further the relationship between two other variables; independent variable |
| outcome variable | a variable (often denoted by y ) that is studied to see if it has changed significantly due to the manipulation of the explanatory variable; dependent variable |
| independent variable | a variable (often denoted by x ) whose variation does not depend on that of another; test variable |
| dependent variable | a variable (often denoted by y ) whose value depends on that of another; outcome variable |
| validity | the extent to which a test measures or predicts what it is supposed to |
| control variable | a variable that is kept constant during a controlled experiment. |
| control group | the group that does not receive the experimental treatment. |
| engineer | a person who is trained to use both technological and scientific knowledge to solve practical problems |
| biologist | a scientist who studies living things |
| geologist | a scientist who studies the earth |
| physicist | a scientist who studies motion, forces, and energy to explain the way things work |
| scientific method | a method of procedure that has characterized natural science since the 17th century, consisting in systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses. |
| debate | a discussion in which reasons are advanced for and against some proposition or proposal |
| scientific community | A collection of people from around the world who share a system of rules and attitudes that sustain the process of producing scientific knowledge |
| empirical evidence | scientific evidence obtained by careful observation and experimentation |
| scientific model | a representation of an object or event that can be studied to understand the real object or event |
| stagnate | To fail to develop, change, or move. |
| phenomenon | A fact or event which can be observed and/or documented |
| durable | sturdy, not easily worn out or destroyed; lasting for a long time |
