Carbon Cycle
Volcano
What is a natural source for CO2?
Minerals and rocks
What is phosphorus mostly contained in?
78%
What percent of the atmosphere is nitrogen?
Biogeochemical cycle
What is a process that elements, chemical compounds, and forms of matter are passed from one organism to another?
The process of respiration
What is the process in which animals use oxygen?
Phosphorus
What is an essential nutrient for life that makes up important chemicals?
Nitrogen
What do higher organisms use to make their proteins?
Oxygen
What is in all of the nutrient cycles?
Coal, oil, and natural gas
What are included in fossil fuels?
Man-made pollution
What is a source of phosphorus in water?
Nitrate and Ammonia
What products are rich in nitrogen and are useful for plant use again?
Freshwater
What type of water has limited phosphorus?
The green house effect
What has occurred because of too much CO2 in the atmosphere?
Plant overgrowth
What is the result of too much phosphorus in the water?
Waste or decaying plants and animals
What ways is nitrogen returned to the soil?
Human Activity
What is the mining and burning of fossil fuels, clearing of land, and use of fertilizers?
Photosynthesis
What process makes sugar and oxygen?
Phosphorus and waste products
What do animals use to help return surfer for the next generation?
Nitrogen-fixing bacteria
What is the name of the bacteria that uses nitrogen to benefit organisms?
Energy
What is the biogeochemical cycle powered by the flow of?