2. We use models to represent Earth Systems

3. WHAT IS A MODEL?
“a representation of a real phenomenon that is difficult to observe directly”
used to explain and predict the behavior of real objects or systems

4. Models Physical – 3d models you can touch
Graphical – used to show things (maps, charts)
Conceptual – verbal or graphical explanation of how a system works or is organized
Mathematical – equations that represent the way a system or process works

5. Physical Model

6. Graphical Model

7. Conceptual Model

9. WHAT IS A SYSTEM?
“a set of connected things or parts forming a complex whole”

10. SYSTEM BOUNDARIES
What are they?
Example

11. BOUNDARY CONDITIONS
Where do we start?

12. Earth Systems

13. Earth Systems

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