Biogeochemical Cycling Crossword Puzzle

QUESTIONS LIST:

• anthropogenic: sources such as fossil fuel combustion which originate from human activity
• biogenic: photosynthesis of oxygen originate from natural functions of biological organisms
• emission: chemical species are emitted to the atmosphere by a variety of sources via a process called _
• deposition: all material in the atmosphere is eventually deposited back to the earth's surface via _ process
• lifetime: also known as residence time
• reservoirs: places where element is recycled, accumulated or held for a long period of times
• transformed: matter can cycle through the biosphere because elements are not used up but are only _
• flux: the action or process of flowing or flowing out
• biogeochemical: the circulation of chemical nutrients such as carbon, oxygen, nitrogen, phosphorus through the biological and physical world is known as _ cycle
• pops: _ are organic compounds that resist environmental breakdown via biological, chemical, and photolythic processes