Benchmark 11C
Common Themes: Constancy and Change
Grades 9-12, page 275

Most systems above the molecular level involve so many parts and forces and are so sensitive to tiny differences in conditions that their precise behavior is unpredictable, even if all the rules for change are known. Predictable or not, the precise future of a system is not completely determined by its present state and circumstances but also depends on the fundamentally uncertain outcomes of events on the atomic scale.

See the general discussion in Unifying Concepts and Processes: Systems, order, and organization.