Zusammenfassung der Ressource
Cycles of Matter
- Carbon Cycle
- Plants take in carbon dioxide
and use carbon to make sugar
molecules.
- Oxygen Cycle
- Plants produce oxygen,
which is then taken by animals
- Animals and plants
break down sugars and release carbon dioxide
- When organisms die, decomposers return
carbon compounds to the soil and release
carbon dioxide to the air.
- Carbon compouds are taken by plants.
- Some human activities release carbon
compounds into the air
- Nitrogen Cycle
- Bacteria in root nodules fix
free nitrogen into simple compounds
- Plants use simple nitrogen compounds to
make proteins and other complex compounds
- Consumers eat nitrogen compounds in plants
- Then, consumers die and decomposers return
simple nitrogen compounds to the soil.
- Soil bacteria release some free nitrogen into
the air