Chaos, or disorder, refers to a state of complete confusion and lack of organization. In chaotic systems, small changes can lead to unpredictable outcomes, making it difficult to establish patterns or control. This concept is often observed in nature, such as in weather patterns or ecosystems, where numerous variables interact in complex ways. In mathematics and physics, chaos theory studies how deterministic systems can exhibit unpredictable behavior. This theory highlights that even simple systems can become chaotic under certain conditions. Examples include the butterfly effect, where a minor change can have significant consequences, illustrating the inherent unpredictability of chaotic systems.