Why is the term earth system used to describe the processes operating on earth?

O It is the global interconnecting web of physical and biological phenomena
o We use it because global change involves the transformations and modifications of physical and biological components of the Earth System through time. Unidirectional change results in transformations that never repeat, whereas cyclical change involves repetition of the same steps over and over again.

Answerair masses develop near the equator are warm; tropical air mass