Final answer:
A scale model of a system is helpful to scientists because it allows them to study complex systems in a simpler and more manageable way.
Step-by-step explanation:
A scale model of a system is helpful to scientists because it allows them to study complex systems in a simpler and more manageable way. By creating a scaled-down version of the system, scientists can observe and analyze its behavior, which may be difficult or impossible to do directly with the real system. For example, in astronomy, scientists use scale models of the solar system to visualize and understand the dimensions and distances that are far beyond our ordinary experience. These models help scientists make predictions and test hypotheses about celestial bodies.