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Environmental Science
ESS SL - unit 2 (DP1)
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Environmental Science
11th
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12 Terms
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1
Open system example
anythig alive - individual living things
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2
Closed system example
terrarium
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3
Isolated system example
universe/space
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4
1st law of thermodynamics
law of conservation of energy/matter - energy cannot be created or destroyed (energy can be transformed and/or transferred)
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5
2nd law of thermodynamics
law of entropy - energy conversion lacks total efficiency (some energy is lost as heat and energy dissipates and can no longer work)
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6
Types of equilibrium
steady-state and static
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7
Steady-state
dynamic state, fluctuates but the system can still function (e.g. water levels)
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8
Static
no change, an inanimate object (no obvious inputs and outputs)
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9
Positive feedback
an effect is reinforced driving the system out of equilibrium and eventually to establish a new equilibrium
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10
Negative feedback
an effect is reversed and re-establishing an equilibrium
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11
Carbon sink
the carbon is being taken out of the atmosphere and fixed into living systems (e.g. photosynthesis)
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12
Resilience
the ability to avoid tipping points (to maintain a steady equilibrium in face of disturbances)
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