Final answer:
A scientific theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experimentation. Theories are reliable accounts of the real world and can be modified or changed based on new evidence.
Step-by-step explanation:
A scientific theory is a well-substantiated explanation of some aspect of the natural world. It is based on a body of facts that have been repeatedly confirmed through observation and experimentation. Theories are not guesses or speculations, but reliable accounts of the real world. They are supported by evidence and can be modified or changed based on new evidence.
Some key features of theories are: they explain natural phenomena, they have a large amount of support, they can be facts, and they are not likely to change. Theories are not laws, but laws can be based on theories when a theory becomes well-established and widely accepted.