Which of the following is one of the Science and Engineering Practices?

• A. Performing experiments without planning
• B. Developing and using models
• C. Memorizing facts
• D. Making observations without measurement

Answer: (B)

Developing and using models is a way to represent how systems work, test ideas, and communicate understanding. Models—whether diagrams, simulations, or physical replicas—let us predict outcomes, compare them with data, and refine explanations as new evidence appears. This makes modeling a core scientific practice because it turns ideas into testable representations that can be updated. The other options don’t fit this practice: doing experiments without planning skips essential structure, memorizing facts is about recall rather than explaining or predicting, and making observations without measurement doesn’t provide the data needed to test any explanation. So forming and using models is the best choice.