PHOSPHORUS SULFUR CYCLE
CYCLE
1. Phosphates are 1. Stored sulfur in rocks
removed from the rocks is released via weathering
via weathering. and then is converted into
sulfate once it comes
contact with air.
2. The phosphates then 2. The sulfate is taken up
move from plants to by plants then move to
animals when herbivores animals when herbivores
eat plants and carnivores eat plants and carnivores
eat herbivores. eat herbivores.
PHOSPHORUS SULFUR CYCLE
CYCLE
3. Phosphates return to the 3. Wastes and remains of
soil through the excretion of plants and animals
urine and feces, and the decompose and sulfur is
final decomposition of released as sulfate and some
plants and animals after enter the tissues of
death. microorganisms.
4. The sulfur emitted
Remember: through volcanic eruption is
added directly into the
Phosphorus cannot be found atmosphere in the form of
in air in the gaseous state. hydrogen sulfide settles
back into the earth or comes
PHOSPHORUS SULFUR CYCLE
CYCLE
3. The phosphate in the 4. Sulfur enters the
soil enters bodies of oceans through runoff
water through runoff and sulfur moves
then aquatic food chain through the aquatic food
take up the waterborne chain.
phosphate.
4. Some phosphates tend 5. Some sulfur tend to
to settle on ocean floors settle on ocean floors
and lake bottoms as and lake bottoms as
sediments to form sediments to form
sedimentary rocks. sedimentary rocks.
PHOSPHORUS SULFUR CYCLE
CYCLE
5. Phosphorus- 6. Geologic uplift can
containing sedimentary transfer the sediment
rock may be moved from back to land. A portion
the ocean to the land by of the sulfur is emitted
a process called geologic back into the atmosphere
uplift. from sea spray.
Sea spray - water in small drops in the atmosphere
is blown from waves or thrown up by a waterfall.
Geologic uplift - is the raising of a land mass
through geological activity such as earthquake.
What is Rock Cycle and its
processes?
What is the importance of Rock
Cycle?
How human activities affect the
cycle?
BIOGEOCHEMICAL CYCLES
A rock is a naturally
occurring solid mixture of
one or more minerals and
organic matter.
BIOGEOCHEMICAL CYCLES
The Rock Cycle
The rock cycle
shows how
any type of
rock can
become any
other type of
rock.
BIOGEOCHEMICAL CYCLES
Rocks change as a result of
natural processes that are
taking place all the time.
BIOGEOCHEMICAL CYCLES
BIOGEOCHEMICAL CYCLES
Six Steps of the Rock Cycle
BIOGEOCHEMICAL CYCLES
1st: Weathering
It is the breakdown
of rocks at the
Earth’s surface by
the action of
rainwater, extremes
of temperature and
biological activity.
BIOGEOCHEMICAL CYCLES
2nd: Erosion and
Transport
Erosion is the process
by which soil and rock
particles are worn away
and moved elsewhere
by gravity or by a
moving transport agent
– wind, water or ice.
BIOGEOCHEMICAL CYCLES
3rd : Deposition
Deposition is the
laying down of
sediment carried by
wind, water or ice.
BIOGEOCHEMICAL CYCLES
4th: Compaction and
Cementation
As the layers of
sediment stack up,
the weight and
pressure compacts
the bottom layers –
compaction.
BIOGEOCHEMICAL CYCLES
4th: Compaction and
Cementation
Dissolved minerals
fill in the small gaps
between particles
and then solidify,
acting as cement –
cementation.
BIOGEOCHEMICAL CYCLES
5th: Metamorphism
Rocks end up buried
deep underground and
rocks are exposed to
high heat and
pressure, which
changes them
into metamorphic
rock.
BIOGEOCHEMICAL CYCLES
6th: Rock Melting
Metamorphic rocks
underground melt to
become magma. When
a volcano erupts,
magma flows out of it.
As the lava cools it
hardens and
becomes igneous rock.
BIOGEOCHEMICAL CYCLES
Importance of Rock Cycle
Formation of soil
Release of life-sustaining
minerals
Building materials
BIOGEOCHEMICAL CYCLES
Human Impact to the Cycle
Quarrying and Mining
