how water moves through the air, land, and organisms – Evaporation- water vapor from surface of bodies of water – Transpiration- water vapor from plants – Condensation- vapor water in clouds
Biogeochemical Cycles • Water cycle- how water moves through the air, land, and organisms – Precipitation- clouds become too full and rain, snow, etc. fall to the earth – Runoff- water collects into bodies of water – Infiltration/Seepage- water from the surface sinks into ground water storage
13.5 Cycling of Matter TEKS 11C, 12E Water cycles through the environment. • The hydrologic, or water, cycle is the circular pathway of water on Earth. • Organisms all have bodies made mostly of water. precipitation condensation transpiration evaporation water storage in ocean surface runoff lake groundwater seepage
13.5 Cycling of Matter TEKS 11C, 12E fossil fuels photosynthesis carbon dioxide dissolved in water decomposition of organisms respiration carbon dioxide in air photosynthesis combustion respiration • Carbon is the building block of life. – The carbon cycle moves carbon from the atmosphere, through the food web, and back to the atmosphere. – Carbon is emitted during the burning of fossil fuels. – Some carbon is stored for long periods of time in areas called carbon sinks.
13.5 Cycling of Matter TEKS 11C, 12E nitrogen in atmosphere animals denitrifying bacteria nitrifying bacteria nitrifying bacteria ammonium ammonification decomposers plant nitrogen-fixing bacteria in soil nitrogen-fixing bacteria in roots nitrates nitrites • The nitrogen cycle mostly takes place underground. – Some bacteria convert gaseous nitrogen into ammonia through a process called nitrogen fixation. – Some nitrogen-fixing bacteria live in nodules on the roots of plants; others live freely in soil.
13.5 Cycling of Matter TEKS 11C, 12E – Ammonia released into the soil is transformed into ammonium. nitrogen in atmosphere animals denitrifying bacteria nitrifying bacteria nitrifying bacteria ammonium ammonification decomposers plant nitrogen-fixing bacteria in soil nitrogen-fixing bacteria in roots nitrates nitrites – Nitrifying bacteria change the ammonium into nitrate. – Nitrogen moves through the food web and returns to the soil during decomposition.
Biogeochemical Cycles Nitrogen Cycle : -Nitrogen fixation- bacteria take nitrogen (N 2 ) from the atmosphere and change it into a form that plants can take up from the soil called ammonium (NH 4 ). -Nitrification- ammonium not taken up by plants are converted to nitrates and nitrites by bacteria which other plants can take up
Biogeochemical Cycles Nitrogen Cycle : -Consumers then eat and take in N in order to make proteins. -Dead organisms can return N to the soil or to the atmosphere with the help of bacteria -Denitrification- bacteria can turn the ammonium back to atmospheric nitrogen
13.5 Cycling of Matter TEKS 11C, 12E geologic uplifting rain weathering of phosphate from rocks runoff sedimentation forms new rocks leaching phosphate in solution animals plants decomposers
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- Ecology, producer, trophic level