Lecture 3_fillin version

Lecture 3_fillin - Atmosphere Opositive rom plants removed by us2(breathing O2 f output negativefeedback feedback inputLecture 2 21 O 3 Feedback

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Atmosphere 21% O 2 78% N 2 How stays the same? output input O 2 from plants O 2 removed by us (breathing) negative feedback positive feedback Lecture 3: Feedback systems and Intro to BGCs Feedback systems : systems tend to ______ in response to feedback; output effects input SYSTEM This balance, where input approximately equals output, or where values remain relatively constant, is called _________ ________ ______. _______ systems are in dynamic equilibrium (stable) Most systems receive feedback and make a ______ in response to the feedback o Output effects input The _______ change can be enhanced (made greater) or weakened. Classic example of FEEDBACK: THERMOSTAT Negative feedback response ________ initial change; keeps balance (like a seesaw) Example 1 : carbon dioxide (CO 2 ) biofeedback As atmospheric CO 2 INCREASES, the biosphere grows (more plants). More plants remove more CO 2 from the atmosphere causing atmospheric CO 2 to DECREASE. Example 2
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This note was uploaded on 10/07/2010 for the course NSC 2004C taught by Professor Farell during the Fall '09 term at Dowling.

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Lecture 3_fillin - Atmosphere Opositive rom plants removed by us2(breathing O2 f output negativefeedback feedback inputLecture 2 21 O 3 Feedback

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