Biogeochemical Cycles page 121
After we die, the nutrients in our bodies will disperse into this:
What is the environment?
This is the percentage of water on our planet that is ocean water, which is too salty to use for drinking or farming.
What is 97%?
This is the series of processes by which carbon compounds are interconverted in the environment:
What is the carbon cycle?
What is:
1- It is a limiting agent in crop growth
2- Makes up 78% of the atmosphere
3- 6th most abundant element
4- Essential ingredient in proteins and DNA
Phosphorus is a key component of what two things?
What is cell membranes and several molecules?
When a reservoir accepts more materials than it releases it is known as this:
What is a carbon sink?
What porous region of rock is ground water held by and how does it get there?
What is an aquafer and it soaks through soil?
What happens to carbon trapped in sediment?
What is it is eventually released into the oceans or atmosphere?
These are three human impacts on the nitrogen cycle:
What are 1) hypoxia in water supplies from improper fertilization, 2)burning fossil fuels that release nitric oxide into the atmosphere and 3) nitrous oxide from animal waste in agricultural feedlots.
A 2008 study determined that the land of this region received a net input of 4.52 kg of phosphorus per year?
What is the Chesapeake Bay Region?
When a reservoir releases more materials than it accepts it is known as:
What is a source?
These are five areas that run-off water travels to:
What are rivers, ponds, streams, lakes, oceans?
This is the second largest carbon reservoir on earth.
What is the ocean?
This process of converting nitrates in soil to water completes the nitrogen cycle.
What is denitrification?
These two components in fertilizer help crops grow.
What are nitrogen and phosphorus?
The rate at which materials move between reservoirs is termed as what?
What is a flux?
Evaporation takes some form of water from what organism
What is causing ocean water to become more acidic?
What is excess CO2 in the atmosphere not being absorbed by water?
Lightening, highly specialized bacteria and human intervention are all examples of:
What are some ways nitrogen can cycle through the environment?
This is how people cause an increase in phosphorus concentrations in bodies of water.
What is through fertilizer runoff?
Nutrients move through ecosystems in cycles that circulate chemical elements through what four systems?
What is the atmosphere, hydrosphere, lithosphere, and biosphere?
What is damming rivers, clear cutting land that increases runoff, withdrawing groundwater for agriculture, industry and domestic use?
This is how much CO2 is unaccounted for in the carbon cycle:
What is 2.3-2.6 billion metric tons?
This helps nitrogen becomes biologically active and available to other organisms to use.
What is undergo a chemical change or become fixed in a water soluble form?
This is why phosphorus is frequently a limiting factor in plant growth:
What is because it is built up i rocks and slowly released?