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5 th Hour Your “Do Now”. Copy down learning target #5 5) I can describe and explain the importance of the carbon and nitrogen cycles to life on earth Finish the notes from up front (copy filled in up front) Work on the practice assignment—due at end of hour.
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5th Hour Your “Do Now” • Copy down learning target #5 5) I can describe and explain the importance of the carbon and nitrogen cycles to life on earth • Finish the notes from up front (copy filled in up front) • Work on the practice assignment—due at end of hour. • MUST DO TWO OF THE CHOICES FOR #6
Your “Do Now” 4/24Copy down the definitions of these terms on Notes 5 • Community: a group of living things interacting with each other • Ecosystem: A community of organisms interacting with the environment Learning Target #5 (write when finished) 5) I can describe and explain the importance of the carbon and nitrogen cycles to life on earth
Observations (no notes) • http://www.youtube.com/watch?v=C6sFP_7Vezg&feature=iv&annotation_id=annotation_320505 • http://www.youtube.com/watch?v=c0En-_BVbGc • http://vro.dpi.vic.gov.au/dpi/vro/vrosite.nsf/pages/soilhealth_organic_carbon-cycle
Agenda 4/24 • Carbon Cycle / Notes #5 • Practice
CH 8 Notes #4 Carbon Cycle • Community: a group of living things interacting with each other • Ecosystem: A community of organisms interacting with the environment
Ecosystems are made of two parts: biotic and abiotic Biotic = parts of the environment that are living Ex: birds, grass, insects, bacteria Abiotic = parts of the environment that are non-living. Ex: rocks, water, soil, air, sunlight
Energy flow • As plants and animals break down the bonds in food some of the energy held in the bonds gets released into the environment
Energy in an ecosystem can change forms and may move into or out of a particular ecosystem
KEY CONCEPT: • Matter and energy cycle through the biotic and abioticparts of the ecosystem. ***THIS MEANS THE TOTAL AMOUNT OF MATTER DOES NOT GO UP OR DOWN, IT JUST CHANGES TYPES***
The Carbon Cycle Process of carbon moving from the environment into organisms and back • Importance: life on earth is carbon based meaning all living things are made of carbon
A trip through the carbon cycle A. Through photosynthesis, plants & algae add O2 to the atmosphere and remove CO2(turned into glucose)
B. When animals eat plants & algae, the glucose in the plants becomes part of them
C. During respiration, organisms return CO2to the atmosphere (made when glucose breaks down) • Remember: Plants & algae make their own glucose, animals get glucose from the organisms they eat!
D. Decomposers: organisms that break down dead or decaying organisms • Note: Bacteria worms, insects & fungi also break down plant & animal waste
Decomposers release CO2 into the atmosphere and other chemicals into the earth. • Fossil fuels: natural fuels made from decomposed dead organisms in the earth • Examples: coal = dead plants buried & heated for millions of years
E. Combustion: burning living plants or fossil fuels for energy, releasing CO2 into the atmosphere Examples: burning wood, coal, oil
F. Carbon atoms in the atmosphere/earth can become a part of plants or algae again, starting the cycle over