Presentation on theme: "Cycles Matter can cycle through the biosphere because biological systems do not use up matter, they transform it. Matter is Recycled within and between."— Presentation transcript:
1 CyclesMatter can cycle through the biosphere because biological systems do not use up matter, they transform it.Matter is Recycled within and between the ecosystems.Matter is assembles into living tissues or passed out of the body as waste.Just think, with every breath you take, you inhale hundreds of oxygen atoms that might have been inhaled by dinosaurs millions of years ago!!
2 The Water CyclePlants and animals need water to liveNatural processes constantly recycle water throughout the environmentAnimals breathe out water vapor, return water to the environment through urinationPlants pull water from the ground and lose water from their leaves through transpiration
4 Precipitation Evaporation 21 The diagram shows physical changes that occur in the water cycle. Which of these showscondensation?A QB RC SD TPrecipitationRun Off of ground waterEvaporation
5 The Carbon CycleAll life on earth is based on carbon. Carbon is a key ingredient of living tissue.Begins during photosynthesis in which CO2 gas is converted to carbon moleculesCarbon molecules are then used for energy and growthAs heterotrophs eat plants, they also gain this energy from carbonWhen the carbon is used, CO2 is released and returned to the atmosphere
6 Carbon Cycle Glucose C6H12O6 is produced by plants, eaten by animals. PhotosynthesisAnimals and plants exhale CO2 which is taken in by plants to make glucoseCellular Respiration
8 Nitrogen CycleLightening and bacteria in the ground “fix” Nitrogen into a form usable by plants.It is absorbed by plants, through their roots as nitrates, so they can be used to build amino acids essential for building proteins, enzymes and the nitrogen bases of DNA.
10 Phosphorus Cycle All organisms require phosphorus for growth Phosphorus cycles in two waysIn the short term cycle, phosphorus is found in plants, animals eat plants, they die, and the phosphorus returns to the soilIn the long term cycle, phosphorus is washed into the sea and is incorporated into rock
13 Biochemical Cycles (Nutrient Cycles) The paths of water, carbon, nitrogen, and phosphorous pass from the nonliving environment to living organisms and then back to the nonliving environment
14 Water CycleGround Water: water retained beneath the surface of the EarthEvaporation: water is heated by the sun and reenters the atmosphereTranspiration: water is drawn from stomata in leaves of plants
15 Water that is not evaporated travels from plants to the atmosphere through transpiration and returns to the Earth as rain.
17 Carbon CycleRespiration: carbon dioxide is given off as a byproduct of cellular respirationCombustion: carbon is released when fossil fuels are burnedErosion: Shells of dead organisms (made of calcium carbonate) form limestone. As limestone erodes, carbon becomes available for other organisms
19 Nitrogen Cycle 79% of the atmosphere is Nitrogen Most organisms cannot use Nitrogen in its atmospheric formNitrogen Fixation: a few bacteria (found in the soil and on roots of some plants) have enzymes that will break down atmospheric nitrogen and form ammonia
20 Assimilation: absorption and incorporation of nitrogen into plant and animal compounds Ammonification: the production of ammonia by bacteria during the decay of nitrogen-containing ureaNitrification: the production of nitrate from ammoniaDenitrification: the conversion of nitrate to nitrogen gas