Question

1. what scientific term is a well - tested explanation for a set of observations or experimental results?

method
conclusion
theory
law

Explanation:

A theory is a well - tested explanation for a set of observations or experimental results. A law describes a relationship or pattern in nature but does not explain why it occurs. A conclusion is the end result of an investigation. A method is a way of doing something (like a procedure in an experiment).

Answer:

theory