5th Grade-Ch. 5 Lesson 6 What Cycles Occur In Ecosystems
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Transcript of 5th Grade-Ch. 5 Lesson 6 What Cycles Occur In Ecosystems
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Lesson 6What cycles
occur in ecosystems?
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niche of decomposers• recycle wastes & dead matter• ex:
• bacteria• fungi• earthworm• fly
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Click for producers, consumers and decomposers game
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decomposersbreak down
minerals& nutrients from deadorganisms
return minerals & nutrients
to soil (plants)
living thingseat plants decomposers
cycle
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nitrogennitrogen• most abundant gas in most abundant gas in
atmosphere (78%)atmosphere (78%)
• sources of nitrogen:sources of nitrogen:
1.1. lightning- rainfalllightning- rainfall
2.2. some bacteriasome bacteria
3.3. fertilizersfertilizers
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Some plants in tropical rainforests contain bacteria that
make nitrogen compounds.
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• nitrogen in soil plants herbivores carnivores
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oxygenoxygen• 22ndnd most most abundant gasabundant gas
• enters enters atmosphere by atmosphere by photosynthesisphotosynthesis
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ways carbon dioxide
entersatmosphere
1. cellular
respiration
2.combustion
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cellular respiration
• food + oxygen energy + CO2 + H20
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combustioncombustion
• burning of a materialburning of a material