Topic 1 = Systems Biosphere Biosphere = atmosphere + lithosphere + hydrosphere + ecosphere Use page 69-70 from the blue book to write a definition of each of the above

Systems Consist of; Storages (of matter or energy) Flows (inputs into the system and outputs from the system) Processes (which transfer or transform energy or matter) Feedback mechanisms that maintain stability and equilibrium.

Use http://teachers. saschina Slides 1 -19

Systems Task ; Complete the task in the to do box on page 72 in the blue book. (use page 2 in the green book to help you) Answer questions 1-3 on biosphere 2 on pg 73 in the blue book.

Systems Task ; Read pg 76-77 and make notes to support 1.14 focusing on the second law of thermodynamics.

Use http://teachers. saschina Slides 19-36

1.15 Explaining the nature of equilibrium Equilibrium is the tendency of the system to return to an original state following disturbance.

1.15 Explaining the nature of equilibrium Steady state equilibrium is a characteristic of open systems where there are continuous inputs and outputs of energy and matter, but the system remains in relativity constant stable state.- e.g. Climax community.

1.15 Explaining the nature of equilibrium In a Static equilibrium there are no inputs or outputs of matter or energy and the no change in the system over time e.g. An object – chair. No natural systems are in static equilibrium. Draw graph time – system state pg 78-79

1.15 Explaining the nature of equilibrium Stable equilibrium = when a system returns to the original equilibrium after a disturbance. Unstable equilibrium = when a system dopes not return to its original equilibrium but forms a new equilibrium. Draw graphs – pg 6 green book

Systems Task ; Give 2 examples of steady state and static equilibrium pg 78 Blue book.