Select the correct answer from each drop-down menu. When Raymond observes certain natural phenomena, he often forms ideas about their causes and effects. Suppose that Raymond surmises that leaves change color in autumn due to scarcity of sunlight. In order to test whether his idea is accurate, he must first construct a falsifiable THEORY, LAW, OR HYPOTHISIS
that defines a clear relationship between two variables. Raymond’s next step is to DESIGN AN EXPERIMENT, COMPLETE MATHEMATICAL CALCULATIONS, OR PROPOSE AN EXPLANATION
that would isolate and test the relationship between the two variables. This task can be pretty daunting because Raymond will need to identify and eliminate any CONFOUNDING, INDEPENDENT, OR DEPENDENT
variables that could confuse test results.