PHOSPHORUS

• SYMBOL AND CHARGE ON PHOSPHATE IONS?

  PO4 (3-)
• KEY LOCATIONS OF PHOSPHORUS?

  • phosphate ions in plants
  • phosphate ions in animals
  • dissolved phosphate ions in oceans, lakes and soils
  • phosphates in rocks
  • phosphate ions in water and remains (e.g. guano, bones, shells)
• HOW ARE PHOSPHATES TRANSFERRED FROM DISSOLVED PHOSPHATE IONS IN OCEANS, LAKES AND SOILS TO PHOSPHATE IONS IN PLANTS?

  absorption
• HOW ARE PHOSPHATE IONS IN PLANS CONVERTED TO PHOSPHATE IONS IN ANIMALS?

  feeding and digestion
• HOW ARE PHOSPHATE IONS IN ANIMALS CONVERTED TO DISSOLVED PHOSPHATE IONS IN OCEANS, LAKES AND SOILS?

  excretion
• HOW ARE PHOSPHATE IONS IN ANIMALS CONVERTED TO PHOSPHATE IONS IN WATER AND REMAINS?

  excretion and decomposition
• HOW ARE PHOSPHATE IONS IN WATER AND REMAINS CONVERTED INTO DISSOLVED PHOSPHATE IONS IN OCEANS, LAKES AND SOILS?

  erosion
• HOW ARE PHOSPHATE IONS IN WATER AND REMAINS CONVERTED TO PHOSPHATES IN ROCKS?

  deposition
• HOW ARE PHOSPHATES IN ROCKS CONVERTED INTO DISSOLVED PHOSPHATE IONS IN OCEANS, LAKES AND SOILS?

  erosion/ use of fertilisers
• HOW ARE DISSOLVED PHOSPHATE IONS IN OCEANS, LAKES AND SOILS CONVERTED INTO PHOSPHATES IN ROCKS?

  sedimentation
• KEY PROCESSES IN THE PHOSPHORUS CYCLE?

  • absorption
  • feeding and digestion
  • excretion
  • excretion + decomposition
  • erosion
  • deposition
  • erosion/ use of fertilisers
  • sedimentation