Energy Flow and Matter Cyclesadapted by ccps.k12.va.us
Objectives
• Discuss energy flow through different ecosystems
• Trace cycles of Carbon, Nitrogen, and water
Ecosystem
All the energetic interactions and material cycling that link organisms in a community with one another and with their environment
Energy and Production
Laws of Thermodynamics
Energy is not created or destroyed. It changes form and place
When energy changes form some of it is lost as heat
Photosynthesis
Chemosynthesis
Compare and Contrast
Food Chains and Food Webs
Definitions
Food Chain– series of steps by which energy stored in plants is passed through an ecosystem
Fig. 5.14
Components
• Producers – plants
• Herbivores – convert plant tissue into animal tissue
• Carnivores – eat other animals, levels
• Omnivores – eats both plants and animals
Components
• Scavengers – animals that eat dead plant and animal matter
• Saprophytes – plant and fungi that absorb dead material
• Decomposers – everything is a decomposer
Matter Cycles
Law of Conservation of Mass
Water Cycle
http://www.ndhealth.gov/wq/sw/z1_nps/images/H2O_cycle.gif
Carbon Cycle
• Fig 5.16
Carbon Cycle
http://eo.ucar.edu/kids/green/cycles6.htm
Nitrogen cycle
http://www.realtrees4kids.org/sixeight/cycles.htm
►Compare and Contrast: Water vs. Carbon and Nitrogen vs. Carbon►How are all of these cycles alike?
►How does water, carbon and nitrogen enter into the earth’s atmosphere?
►How does water, carbon and nitrogen leave the earth’s atmosphere?►Where are each of these stored?
►Predict: If fuels are burned and released into the atmosphere, how does carbon dioxide effect plant growth?
►What are 3 forms of water in the water cycle?