Work Notes Flashcards
What is an open system?
Where matter and energy can be transferred from the system across the boundary to the surrounding environment.
What is a closed system?
Transfers of energy can occur across the boundary but no transfer of matter
What are isolated systems?
No transfers of energy or matter across the boundary
What is it called when a feedback increases an initial warming?
Positive feedback
What is it called when a feedback reduces an initial warming?
Negative feedback
What are tipping points?
When a large and irreversible change in the state of an environment system occurs.
What are the 5 stores of freshwater?
Cyrosphere
Groundwater
Surface water
Atmospheric
Biotic
How much water is in the oceans?
97%
How much water is groundwater?
20%
How much water is terrestrial water?
1%
What is an example of surface/terrestial water source?
Rivers and lakes
What is an example of a source of terrestrial water that has been affected by human activity?
The Aral Sea
What happened to the Aral Sea?
Shrunk by 90% due to irrigation of 2 major rivers
What is an example of atmospheric water source?
Water vapour
What is a drainage basin?
The area drained by a river and its tributaries
