Presentation on theme: "Write everything that is underlined"— Presentation transcript:
1 Write everything that is underlined Section 13-5 “Cycles”Write everything that is underlined
2 KEY CONCEPT: Matter cycles in and out of an ecosystem.
3 I. The Water Cycle 1. The hydrologic, or water cycle is the circular pathway of water on Earth. precipitationcondensationtranspirationevaporationwater storagein oceansurfacerunofflakegroundwaterseepage
4 2. Key terms for the water cycle: Precipitation: moisture that falls to the ground (rain, snow, sleet, hail)Evaporation: changing from liquid to gas (water to water vapor)Transpiration: plants give off water vapor from their leaves to the airCondensation: changing from gas to a liquid (little water droplets form on the outside of a cold glass of lemonade - that’s condensation)
5 II. Oxygen Cycle:1. Plants make food by photosynthesisThey use carbon dioxide (CO2) to make oxygen (O2)2. Animals breathe out carbon by respirationThey use oxygen (O2) and breathe out carbon dioxide (CO2)By the way … humans are animals too
7 ActivityDraw, label, color, and explain the water cycle and oxygen cycles on a sheet of paper.Page 413 figure & 13.13Due tomorrow
8 1. Carbon is the building block of life. III. Carbon Cycle1. Carbon is the building block of life.The carbon cycle moves carbon from the atmosphere, through the food web, and returns to the atmosphere.Carbon is emitted by the burning of fossil fuels (like oil, gasoline, and coal)
9 Carbon Cycle: notice photosynthesis and respiration are back … they both involve CO2 (now we’re looking at the C for carbon)fossil fuelsphotosynthesiscarbon dioxidedissolved in waterdecompositionof organismsrespirationcarbondioxidein aircombustion
10 IV. The Nitrogen CycleThe nitrogen cycle mostly takes place underground.Some bacteria convert gaseous nitrogen into ammonia through a process called nitrogen fixation.Some nitrogen-fixing bacteria live in nodules on the roots of plants; others live freely in the soil.nitrogen inatmosphereanimalsdenitrifyingbacterianitrifyingammoniumammonificationdecomposersplantnitrogen-fixingbacteria in soilbacteria in rootsnitratesnitrites
11 Nitrifying bacteria change the ammonium into nitrate. Ammonia released into the soil is transformed into ammonium.Nitrifying bacteria change the ammonium into nitrate.nitrogen inatmosphereanimalsdenitrifyingbacterianitrifyingammoniumammonificationdecomposersplantnitrogen-fixingbacteria in soilbacteria in rootsnitratesnitritesNitrogen moves through the food web and returns to the soil during decomposition.
12 Phosphate is released by the weathering of rocks. V. Phosphate CyclePhosphate is released by the weathering of rocks.Phosphorus leaches into groundwater from the soil and is locked in sediments.Both mining and agriculture add phosphorus into the environment.geologic upliftingrainweathering ofphosphate from rocksrunoffsedimentationforms new rocksleachingphosphate in solutionanimalsplantsdecomposersphosphatein soil
13 ActivityDraw, label, color, and explain the Carbon and Nitrogen cycles on a sheet of paper.Page figure & 13.15Due tomorrow
14 Review Questions 13.5 Cycling of Matter What is the key concept of this unit?Define the key terms for the water cycle.What do plants take in and then give out. What do animals take in and give out?How does the carbon cycle move carbon?Where is carbon emitted?Where does the nitrogen cycle take placeWhat are phosphates released by?