Scientists propose explanations for questions about the natural world, and engineers propose solutions relating to human problems and needs. Science and technology are reciprocal. Science drives technology as it addresses questions that demand more sophisticated instruments. Technology provides tools for investigation, inquiry, and analysis. Perfectly designed solutions do not exist.
All technological solutions have trade-offs, such as safety, cost, efficiency, and appearance.
Technological designs have constraints. Technological solutions have intended benefits and unintended consequences. Some consequences can be predicted, others cannot. The potential for accidents and the existence of hazards impose the need for injury prevention. Safe living involves the development and use of safety precautions.