Can scientific ideas and concepts be changed? Why or why not?

Yes

Explanation:

Scientific concept is a scientific theory or law that gives proof of how and why a natural event or process occurs.

Yes, scientific ideas and concepts can be changed because the research never stop and when scientists come with a new theory which is more strong than old theory, the old theory is required to be changed.

For example: In the scientific concept of classification of biodiversity, earlier organisms were classified into binomial system including plant and animal kingdoms but now we have five kingdoms that includes monera, protists, fungi,  plant and animal kingdoms.