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Flashcards in Systems Quiz Deck (40)
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1

What are the four cycles?

Hydrologic, carbon, phosphorus, sulfur

2

Water cycle

Movement of water from ocean to atmosphere back to ocean

3

Transpiration

Release of water from leaves during photosynthesis

4

What's the rate of transportation affected by (3)

1. Increases in temperature
2. Increases in wind
3. Decreases in humidity

5

Evapotranspiration

Combined amount of evaporation and transpiration

6

What's the human impact of hydrologic cycle (3)

1. Withdrawal
2. Increased chance of flooding
3. Deforestation

7

What's the carbon cycle

Movement of carbon around biosphere

8

Where are the major reservations of carbon (3)

1. Oceans
2. Biosphere
3. Atmosphere

9

What type of carbon do ocean, biosphere, and atmosphere have?

1. Carbonate and bicarbonate
2. Organic bio molecules
3. Atmosphere

10

What are the human impacts on carbon cycle?

Major impact increasing CO2 concentration in atmosphere by burning fossil fuels and clear cutting

11

What's the equation for a combustion rxn, which is also known as -?

Carbon combustion

CH4+O2->CO2+H2O

12

Nitrogen cycle

Movement of nitrogen around atmosphere

13

What's elemental nitrogen?

Na

14

What's nitrogen fixation?

Conversion of nitrogen gas molecule in atmosphere into ammonia (NH3) and ammonium (NH4+)

15

What is nitrogen fixation accomplished by? (3)

Cyanbacteria in water
Bacteria in soil
And lightning

16

What ways can nitrogen fixation occur? (2)

1. Biotic process
2. Bacteria converting N2->ammonium

17

What are the abioticalls (2)

Combustion of NO2 to ammonium
Lightning

18

What's ammonification?

Decomposers convert organic remains into detritus and eventually into inorganic ammonia and ammonium ions
Organic N1->ammonium (NH4+)

19

What's nitrification?

Bacteria convert ammonia or ammonium ions in the soil into nitrate ions (NO3) for plants to uptake

20

Denitrification?

Bacteria in aquatic sediments covert ammonia and ammonium ions into nitrogen gas (N2) and nitrous oxide (N2O)

21

What are the human impacts on the N cycle? (3)

1. Excess nitrates
2. Burning of fossil fuels
3. Using inorganic fertilizers

22

What's the phosphorus cycle?

The movement of excess phosphorus around the biosphere
Does not include atmosphere, no gas form
Released from rocks

23

Human impacts of phosphorus cycle? (1), causes and effects?

Phosphate runoff

Causes/effects:
Mining phosphorus rocks
Phosphorus containing detergents

24

What's the sulfur cycle?

Movement of sulfur around the biosphere

25

What are the human impacts on sulfur cycle (1)

Release of sulfur dioxide (SO2) gas

26

What's infiltration? What cycle?

Movement of water into the soil, water cycle

27

What's percolation, what cycle?

Downward flow of water, water cycle

28

What two ways does water return to the oceans from the land?

Groundwater flow, surface runoff

29

Way that humans may intervene in water cycle? (2)

Withdrawal of water and disposing wastes

30

Main reservoir for water on earth?

Oceans

31

Main reservoir for fresh water? (7)

Lakes, rivers, ponds, glaciers, snow, ice, atmosphere

32

Describe important role of plants through ecosystem?

Plant removes water from soil and, through transpiration, returns it back to the atmosphere through transpiration

33

Study the nitrogen cycle picture

Yay!

34

What two processes release carbon into the atmosphere?

Respiration and combustion

35

Name the four reservoirs (sinks) that can act as a source of carbon

Atmosphere
Coal
Limestone (calcium carbonate)
Oil of natural gas

36

Diatoms carry out- and decomposers carry out -

Photosynthesis, respiration

37

Photosynthesis equation
Respiration equation

6CO2+6H2O+Sunlight->C6H12O6+6O2

Respiration-reverse that

38

What effect does human activity have on the amount of carbon stored in sinks

Reducing fossil fuels, increasing CO2 in atmosphere

39

Describe 2 global effects arising from reducing fossil fuels

Increasing CO2 in atmosphere and increase pollution

40

Suggest what could be done to alleviate increasing CO2 in atmosphere and increasing pollution

Minimize reliance on fossil fuels, find alternative