Scientific Hypothesis: A hypothesis is an idea or proposition that can be tested by observations or experiments, about the natural world. In order to be considered scientific, hypotheses are subject to scientific evaluation and must be falsifiable, which means that they are worded in such a way that they can be proven to be incorrect.

Scientific Theory: a theory is a coherent explanation for a large number of facts and observations about the natural world. 

Scientific Model: is a conceptual representation whose purpose is to explain and predict observed phenomena.

Scientific law: A scientific law is a description of a natural phenomenon or principle that invariably holds true under specific conditions and will occur under certain circumstances.