Systems Quiz Flashcards
(40 cards)
What are the four cycles?
Hydrologic, carbon, phosphorus, sulfur
Water cycle
Movement of water from ocean to atmosphere back to ocean
Transpiration
Release of water from leaves during photosynthesis
What’s the rate of transportation affected by (3)
- Increases in temperature
- Increases in wind
- Decreases in humidity
Evapotranspiration
Combined amount of evaporation and transpiration
What’s the human impact of hydrologic cycle (3)
- Withdrawal
- Increased chance of flooding
- Deforestation
What’s the carbon cycle
Movement of carbon around biosphere
Where are the major reservations of carbon (3)
- Oceans
- Biosphere
- Atmosphere
What type of carbon do ocean, biosphere, and atmosphere have?
- Carbonate and bicarbonate
- Organic bio molecules
- Atmosphere
What are the human impacts on carbon cycle?
Major impact increasing CO2 concentration in atmosphere by burning fossil fuels and clear cutting
What’s the equation for a combustion rxn, which is also known as -?
Carbon combustion
CH4+O2->CO2+H2O
Nitrogen cycle
Movement of nitrogen around atmosphere
What’s elemental nitrogen?
Na
What’s nitrogen fixation?
Conversion of nitrogen gas molecule in atmosphere into ammonia (NH3) and ammonium (NH4+)
What is nitrogen fixation accomplished by? (3)
Cyanbacteria in water
Bacteria in soil
And lightning
What ways can nitrogen fixation occur? (2)
- Biotic process
2. Bacteria converting N2->ammonium
What are the abioticalls (2)
Combustion of NO2 to ammonium
Lightning
What’s ammonification?
Decomposers convert organic remains into detritus and eventually into inorganic ammonia and ammonium ions
Organic N1->ammonium (NH4+)
What’s nitrification?
Bacteria convert ammonia or ammonium ions in the soil into nitrate ions (NO3) for plants to uptake
Denitrification?
Bacteria in aquatic sediments covert ammonia and ammonium ions into nitrogen gas (N2) and nitrous oxide (N2O)
What are the human impacts on the N cycle? (3)
- Excess nitrates
- Burning of fossil fuels
- Using inorganic fertilizers
What’s the phosphorus cycle?
The movement of excess phosphorus around the biosphere
Does not include atmosphere, no gas form
Released from rocks
Human impacts of phosphorus cycle? (1), causes and effects?
Phosphate runoff
Causes/effects:
Mining phosphorus rocks
Phosphorus containing detergents
What’s the sulfur cycle?
Movement of sulfur around the biosphere