Topic 1 = SystemsBiosphere

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;1. Storages (of matter or energy)2. Flows (inputs into the system and

outputs from the system)3. Processes (which transfer or

transform energy or matter)4. Feedback mechanisms that

maintain stability and equilibrium.

• Use http://teachers.saschina.org/csmith/ib-environmental-systems-societies-lectures-presentations/

• Slides 1 -19

Systems

Task ; 1. 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)

2. Answer questions 1-3 on biosphere 2 on pg 73 in the blue book.

Systems

Task ; 1. Read pg 76-77 and make notes to

support 1.14 focusing on the second law of thermodynamics.

• Use http://teachers.saschina.org/csmith/ib-environmental-systems-societies-lectures-presentations/

• Slides 19-36

1.15 Explaining the nature of equilibrium

Equilibrium is the tendency of the systemto return to an original state followingdisturbance.

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 inrelativity 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 systemsare in static equilibrium.

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.

Systems

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