Which biogeochemical cycle includes an underground reservoir in the form of fossil fuels?

BIOGEOCHEMICAL CYCLES    Name KEY

Name the 4 biogeochemical cycles you learned about:

CARBONNITROGEN

PHOSPHORUSWATER (HYDROLOGIC)

NAME THE CYCLE DESCRIBED:

__CARBON  Cycle in which photosynthesis and cellular respiration participate

__PHOSOPHORUS  Only cycle which does not pass through the atmosphere

__WATER  Cycle that involves transpiration

__NITROGEN  Cycle which is dependent on bacteria for nitrogen fixation and denitrification

__CARBON Cycle in which volcanic activity and burning fossil fuels plays a role

__HYDROLOGIC  Another name for the water cycle

__CARBON  Cycle which includes an underground reservoir in the form of fossil fuels

NAME THE STEP IN A BIOGEOCHEMICAL CYCLE:

NITROGEN FIXATION__  Process in which nitrogen gas from the atmosphere is converted into ammonia    by bacteria that live in the soil and on the roots of plants called legumes

_DENITRIFICATION  Process in which soil bacteria convert nitrogen compounds in soil back      into nitrogen gas which is released into the atmosphere

_PHOTOSYNTHESIS Process in which sunlight is used to change atmospheric carbon into

   biomolecules used for energy by living things

_TRANSPIRATION Process in which water evaporates from the surface of plant leaves

_DECOMPOSITION Process in which nutrients in dead organisms are returned to the soil

CELLULAR RESPIRATION_  Process in which the break down of sugars in living things returns carbon

   to the atmosphere as CO2

_EVAPORATION  Process in which liquid water changes into gas form

_CONDENSATION  Process in which water vapor (gas) changes into liquid water

_PRECIPITATION  Process in which condensed water in clouds falls to the Earth’s surface

_RUNOFF  Process ALL of the cycles have in common that links land and surface water

Mention which group of organisms that all the cycles have in common which keeps matter cycling between living (organic) and nonliving (inorganic) parts of the ecosystem.

__DECOMPOSERS

Tell 2 human activities by which carbon can enter the atmosphere as CO2 during the carbon cycle

   ___BURNING FOSSIL FUELS, CELLULAR RESPIRATION,

Name 2 NON-human activities by which carbon can enter the atmosphere or oceans during the carbon cycle.

VOLCANIC ACTIVITY, DECOMPOSITION, DISSOLVING IN WATER

Tell one way carbon leaves the atmosphere during the carbon cycle.

___PHOTOSYNTHESIS, DISSOLVING IN WATER,

Tell 2 ways water enters the atmosphere in the water cycle

EVAPORATION AND TRANSPIRATION

Tell something humans do to return nitrogen to the soil for the nitrogen cycle.

__DECOMPOSITION, FERTILIZER USE

Although almost 80% of the atmosphere is made up of nitrogen gas, most living things don’t have the enzymes necessary to use nitrogen directly from the atmosphere. Tell how we get the nitrogen we need to make proteins and DNA if we can’t get it from breathing.

We don’t have the enzymes necessary to remove nitrogen from the atmosphere; we get our  nitrogen from the FOOD WE EAT.

Explanation: