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Nitrogen
________- Found in many organic molecules, including the amino acids that make up proteins and nucleic acids that make up DNA.
Carbon
________ dissolved in seawater is used for phytoplankton and kelp for photosynthesis.
Phosphorus
________- Found in the bone and in the molecule ATP.
Sulfur
________- Found in 2 amino acids that are important for giving proteins their shape.
Limestone
________ and carbon trapped in fossil fuels and coal.
Forests
________ store 90 % of the planet's aboveground carbon and 75 % of soil carbon.
Assimilation
________- Plants absorb ammonia, ammonium ions, and nitrate ions through their roots.
Nitrification
________- Ammonia is converted into nitrate and nitrite.
Ammonia
________ has tripled since the industrial revolution.
Denitrification
________- Anaerobic bacteria convert ammonia into nitrites, nitrogen gas, and nitrous oxide.
portion of atmospheric carbon
A(n) ________ is removed through photosynthesis in which carbon gets incorporated into plant structures and compounds.
water cycle
The ________ is in a state of dynamic equilibrium by which the rate of evaporation equals the amount of precipitation.
air quality
It decreases ________.
main source of sulfur
The ________ in the oceans is through dissolved sulfate.
Sulfur
________ in the lithosphere is mobilized by slow weathering of rock material.
Nitrogen Fixation
__________________ - Atmospheric nitrogen is converted into ammonia or nitrate ions which are biologically usable forms of nitrogen.
Water
_______ - Helps to dissolve minerals, makes them accessible to the body, regulates body temperature, and carries nutrients and oxygen to cells throughout the body.
