Closed System – Matter stays within, Energy can go in/out of system

Open System – Both Matter and Energy can go in/out of system

Systems

theBalancing

Budget

Input

Output

Energy Budget – A balance of inputs or outputs within a system.

Budgets

Balanced

Unbalanced

Budgets

Feedback Loops – A pathway formed by an ‘effect’ returning to its ‘cause’

+ -= Amplification = Equilibrium

Feedback Loops

Positive Feedback Loop – A change in one variable (increase or decrease results in the same type of change (increase or decrease) in another variable.

+

Feedback Loops

Negative Feedback Loop – A change in one variable (increase or decrease) results in the opposite type of change (increase or decrease) in another variable.

-

Feedback Loops

Account balance grows Body

Temperature Decreases

Earn money

Earn more interest

Body Sweat Increases

Body Temperature Rises

Birthrate Increases

Population increases

Feedback LoopsPositive Negative Positive

Biogeochemical Cycles• Bio – biosphere or life• Geo – geosphere or rock• Chemicals

Biogeochemicals - the movement (or cycling) of matter (chemicals) through the Erath’s systems. They are part of the larger cycles that describe the functioning of the whole Earth (not just the surface parts).

To sum it up, these living to nonliving (and vice versa) pathways are all made of different biological, geological, and chemical processes that help make the world go 'round and life exist on Earth.

Biogeochemical CyclesMake a list of all of Earth’s cycles that you are familiar with and describe how they work.