Cycling of Matter
Water Cycle
• Hydrosphere- water
of Earth’s surface
• Water Cyclemovement of water in
the hydrosphere,
driven by sunlight
Hydrological Cycle
Biochemical Cycles
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Oxygen
Carbon
Nitrogen
Phosphorous
Nitrogen & Carbon Cycle
Nitrogen Cycle
• Describes the transformations of nitrogen and nitrogencontaining compounds in nature. It is a cycle which
includes gaseous components.
• Earth's atmosphere is about 78% nitrogen, making it
the largest pool of nitrogen.
• Nitrogen is essential for many biological processes; it is
crucial for any life here on Earth. It is in all amino acids,
is incorporated into proteins, and is present in the
bases that make up nucleic acids, such as DNA and
RNA.
Nitrogen Cycle
Movement of Nitrogen between atmosphere,
bacteria and other organisms
Oxygen Cycle
• the movement of oxygen within and between
its three main reservoirs:
• atmosphere (air),
• biosphere (living things)
• lithosphere (Earth's crust).
• The main driving factor of the oxygen cycle is
photosynthesis, which is responsible for the
modern Earth's atmosphere and life.
Oxygen Cycle
Carbon Cycle
The cycle is usually thought of as four major reservoirs of
carbon interconnected by pathways of exchange. These
reservoirs are:
• The atmosphere.
• The terrestrial biosphere, which is usually defined to
include fresh water systems and non-living organic
material, such as soil carbon.
• The oceans, including dissolved inorganic carbon and
living and non-living marine biota,
• The sediments including fossil fuels
Phosphorous Cycle
• Describes the movement of phosphorus through
the lithosphere, hydrosphere, and biosphere.
• Unlike many other biogeochemical cycles, the
atmosphere does not play a significant role in the
movements of phosphorus, because phosphorus
and phosphorus-based compounds are usually
solids at the typical ranges of temperature and
pressure found on Earth.
Natural Leaching
Human Impact
Phosphorus Cycle
Movement of phosphorus from the
environment to organisms and back
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