C: Biogeochemical cycles

Evaporation

Evaporation

WATER CYCLE: Water rises into atmosphere

Transpiration

WATER CYCLE: Excess water from plants evaporates

Condensation

WATER CYCLE: Water forms clouds

Precipitation

WATER CYCLE: Water falls as rain/snow

Infiltration

WATER CYCLE: Movement of water into soil

Percolation

WATER CYCLE: Downward flow of water through soil/permeable rock

Respiration

CARBON CYCLE: Carbon goes from organism into air

Photosynthesis

CARBON CYCLE: Carbon goes from air into organism (plant)

Decomposition

CARBON CYCLE: Carbon goes into soil

Combustion

CARBON CYCLE: Carbon released into atmosphere; can be natural (volcanoes) or anthropogenic (burning fossil fuels)

Carbon sinks

CARBON CYCLE: Large amounts of carbon stored in oceans, forest, sedimentary rock, soil, etc

Nitrogen fixation

NITROGEN CYCLE: Lightning or ertain kinds of bacteria converts atmospheric nitrogen (N2) to ammonia (NH3)

Nitrification

NITROGEN CYCLE: Ammonia (NH3) is converted to nitrate (NO2-) then nitrate (NO3-)

Assimilation

NITROGEN CYCLE: Plant roots absorb ammonium ions (NH4+) and nitrate ions (NO3-)

Ammonification

NITROGEN CYCLE: Organic nitrogen broken down to ammonia (NH3) and then ammonium (NH4+)

Denitrification

NITROGEN CYCLE: Nitrate ions (NO2-) and nitrate ions (NO3-) are transformed by microbes into atmospheric nitrogen (N2)