ecosystems

• ecosystem- made up of living and non- living organisms and physical conditions in an area
• community- organisms within the ecosystem
• habitat- area organisms live in
• population- total number of organisms of a species in an area
• species- a group of organisms which can breed to produce fertile offspring
• producers- make food via photosynthesis
• consumers- cannot make own food, feed on other organisms for energy
• decomposers- feed on dead decaying matter and release oxygen
• as an organism grows, the biomass increases
• biomass - mass of living
• food chains- display what an organism eats
• trophic level- each step in the food chain
• food webs- series of interlinked food chains