Question

For what reasons could a theory be changed or replaced? (Check all that apply.)

A. New experimental evidence contradicts it.
B. It becomes popular among scientists.
C. It fails to explain observed phenomena.
D. It is too complex for understanding.

Answer 1

A theory can be changed or replaced if new evidence contradicts it, if it fails to explain observed phenomena, or if it is too complex for understanding.

Step-by-step explanation:

A scientific theory can be changed or replaced for several reasons:

1. New experimental evidence contradicts it: If new experiments or observations are inconsistent with the predictions or explanations provided by a theory, then it may need to be revised or discarded.
2. It fails to explain observed phenomena: If a theory is unable to provide a satisfactory explanation for observed phenomena, it may need to be reevaluated or replaced with a more effective theory.
3. It is too complex for understanding: While complexity alone is not a sufficient reason to change or replace a theory, if a theory becomes unnecessarily convoluted and lacks simplicity, scientists may seek to develop a more concise and accessible explanation.