A scientific theory is best described as a well-substantiated explanation of an aspect of the natural world. It is based on a body of evidence and has withstood rigorous testing and peer review. Scientific theories are not simply guesses or untested ideas; rather, they are comprehensive frameworks that help explain and predict phenomena in the natural world based on available evidence.
What is a scientific theory?
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a detailed record of experimental results
an untested idea about natural phenomena
a well-substantiated explanation of an aspect of the natural world
a guess about how something might work
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