31Water CycleEcosystems maintain a supply of water to survive
32Carbon Cycle Animals take in oxygen and release carbon dioxide (Cellular Respiration)Plants take in carbon dioxide an release oxygen(Photosynthesis)
33Nutrients Recycle Plants use nutrients in the soil to grow Nutrients are transferred through food chainDead and waste of organisms are recycled and put back into the soil by decomposers(Bacteria and Fungi)
34Aim How do people affect the way ecosystems function?
35The Flow of EnergyEnergy is passed through the environment but NOT recycledEnergy pyramid loses large amount of energy to heatSun is constant source of energy
36Population GrowthThe population levels off as it reaches an ecosystems carrying capacity
37Direct HarvestingDestruction or removal of a species from a habitat which can lead to extinctionAn example is when an exotic animal is removed for a pet( Cute monkey or parrot)
38Invasive SpeciesWhen people remove a species from one environment to anotherThey become pest because they usually have no natural enemy and multiply quickly
39Land UseAs human populations grow we need more resources to make things we need(clothes, MP3 players and cars)Need more space for factories and homes
40Deforestation Need to clear land to make homes and factories This leads to habitat destruction
41Leads to Loss of Biodiversity Direct HarvestingImported SpeciesDeforestation
42Aim What is the impact of technology and industrialization on the environment?
43IndustrializationThe development of an economy in which machines produce our products
44We Need PowerBurn fossil fuelsNuclear fuels (splits atoms)