John Dalton postulated that all matter is composed of small particles called atoms. For this proposition to be considered a valid scientific theory, ________
A)it must be supported by experimental evidence and testing.
B)it must be impossible to prove wrong by experiment.
C)all possible experiments must never find an exception to it.
D)some, but only a few, experiments may find exceptions to it.
E)it must be voted on by the scientific community and accepted by all.

Question

Quizplus · Accepted Answer

For a proposition to be considered a valid scientific theory, it must be supported by experimental evidence and testing. This is a fundamental principle of the scientific method, and without empirical evidence to support the hypothesis, it cannot be considered a theory. Hence, option A is the correct answer. Option B is incorrect because a theory must be tested and falsifiable, else it becomes a philosophical or metaphysical proposition. Option C is incorrect because science is always subject to revision based on new evidence or experimental results. Option D is incorrect because too many exceptions would mean that the theory is not adequate or consistent with observations. Finally, option E is incorrect because scientific theories are not matters of consensus or popularity, but rather conclusions reached by following a rigorous and logical methodology.

John Dalton Postulated That All Matter Is Composed of Small