Final answer:
A scientific model is a representation of something complex or difficult to study directly. One limitation of a scientific model is that it may not accurately represent the system in all respects.
Step-by-step explanation:
A scientific model is a representation of something that is often too difficult to study directly. It is useful for studying a complex system or systems that humans cannot observe directly. One limitation of a scientific model is that it is not the "real thing" and may not accurately represent the system in all respects. While models can simplify the system and make it easier to understand, they cannot be used in almost any situation to explain a system, nor are they more accurate than observing the real object or system.