In science, conceptual representations of observed phenomena are called what?

• A. Laws
• B. Models
• C. Hypotheses
• D. Theories

Answer: (B)

Models are simplified representations that help us understand and communicate how complex phenomena work. They can be physical or conceptual and are built from observations to capture the essential relationships in a system. This concept fits best here because a model serves as a stand-in that lets you reason about what you’re observing, make predictions, and test ideas.

Laws describe consistent relationships—often as equations—without aiming to represent the system’s structure or behavior in a broader sense. Theories are broad explanations that unify many facts under a framework, not just a single representation. Hypotheses are testable statements proposed to explain observations and be challenged by data. A conceptual representation, such as a diagram of the water cycle or an atomic model, is exactly what we mean by a model.