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Chapter 2: Earth's Spheres and Cycles

Horizontales
The realm of organisms
occasionally large catastrophes have altered the course of Earth history
geologic change occurs over long periods of time, by a sequence of almost imperceptible events
a combination of interacting parts that form a complete whole
geologic processes operating today also operated the same in the past
Most abundant element in Earth's atmosphere
a sequential process of phenomenon that returns to its beginning and then repeats itself over and over
Verticales
When a system stays constant or changes minimally to stresses until a critical point is reached and then rapid change ensues
The gaseous layer above Earth's surface
The rocky part of the Earth, both solid and molten
The watery, icy part of our planet
Substance necessary for living things and regulating climate on Earth