Question

Which situation would result in a theory being replaced rather than revised?

Answer 1

The question is incomplete.

However,

Scientific theory: An explanation accompanied with the testing and verification of the natural world by scientific methods is called as a scientific theory.

The situation where new information is discovered that contradicts the existing theory.

Reason:

• The replacement of the old theory.
• A contradicted theory cannot be used.
• Improvement of the existing theory.

Hence, the answer is new information is discovered that contradicts the existing theory.

Answer 2

Explanation:  

Scientific theories are created based on scientific experiments and evidences that support that theory. When an existing theory is contradicted by evidence from research that disproves this particular theory, then the theory would be replaced.  

For any theory to be replaced there needs to be strong evidence in support of the new theory and also evidences to show why the existing theory does not hold true anymore. Only on the basis of scientific proof are theories replaced or revised.  

In a case where an existing theory is supported by additional evidences that leads to some modifications in the theory, in that case it gets revised and not replaced.