A possible explanation for repeatedly observed patterns in nature supported by observations and results form many investigations.
Scientific law
A rule that describes a pattern in nature but does not try to explain why something happens.
System
Collection of structures, cycles, and process that relate to interact with each other.
Life science
Study of living of and how they interact.
Earth science
Study of Earth systems and systems in space, including wether and climate systems, and the study of nonliving things such as rocks, oceans, and planets