5. The scientific method begins with an observation, information drawn from these observations rests on the principles of scientific thinking. What are the 3
principles of scientific thinking?
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Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium