Lecture 01: Key System Concepts
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16 Terms
Atmosphere
Layer of Gasses Surrounding Earth
Biosphere
Living Things on Earth
Hydrosphere
Earth’s Water
Lithosphere
Earth’s Solid Outer Layer
Open System
Exchanges Matter and Energy
Closed System
Exchanges Energy and Not Matter
External Forcing
External Force that Changes the System
External Force Example
Earth Receives Energy from Sun, Temperature Increases
Internal Feedback
System Changes and Responds, Affecting Original Change
Internal Feedback Example
Earth gets Hot, Ice Melts and Reflects Sunlight, Earth gets Hotter
State Variable
Quantity Describing the State of a System
State Variable Example
The Temperature is 60 Degrees
Coupling
Part of the System Affecting the Other
Coupling Example
Temperature Increases, Ice Melts
Feedback
System Responds to a Change, Returning to Affect Original Change