a statement identifying a possible relationship between variables, expressed in such a way that it can be scientifically tested - hypothesis
a true statement that can be experimentally tested and measured to be correct - scientific law
a representation of an explanation of a phenomenon that relates a set of complex factors and from which predictions can be made - scientific model
an event expected to occur on the basis of logic and objectivity - prediction
the result of careful and objective use of our senses or with the aid of devices and instruments - observation
an experiment or investigation that is designed so that the results are true indicators of a relationship between variables - valid investigation
an explanation of a phenomenon that is supported by evidence from a range of fields or investigations - scientific theory
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