Final answer:
Scientific theories can change based on new evidence, observations, and technological advancements. This continuous process contributes to the ongoing nature of science.
Step-by-step explanation:
A scientific theory can change when new evidence is discovered that contradicts or modifies the existing theory. Scientists are constantly testing and revising their ideas based on new observations and discoveries. The development of new technologies can also lead to changes in theories, as they allow us to observe things that were previously unobservable. This continuous process of testing, revising, and perfecting scientific theories contributes to the ongoing nature of science, as our understanding of the natural world becomes increasingly accurate and detailed over time.