Biogeochemical cycle is a pathway by which a chemical substance moves through both biotic (biosphere) and abiotic (lithosphere, atmosphere, and hydrosphere) compartments of Earth.

1. BioBiogeogeochemicchemic
alal CyclesCycles
by : Peris T. Khorshidby : Peris T. Khorshid
KUKURRDEDE

3. An
ecosystem
survives by
a
combination
of energy
flow and
matter
recycling

4. Biogeochemical cycleBiogeochemical cycle is a pathway by which ais a pathway by which a
chemical substancechemical substance moves through both biotic (moves through both biotic (
biospherebiosphere) and abiotic () and abiotic (lithospherelithosphere,, atmosphereatmosphere,,
andand hydrospherehydrosphere) compartments of) compartments of EarthEarth..
A cycle is aA cycle is a
series ofseries of
changechange
which comeswhich comes
back to theback to the
startingstarting
point andpoint and
which can bewhich can be
repeated.repeated.

5. Global Recycling
1.Nutrients are the elements and
compounds that organisms need
to live, grow, and reproduce.
2.Biogeochemical cycles move
these substances through air,
water, soil and living organisms.

6. Important biogeochemical cycles are:Important biogeochemical cycles are:
1.1.Water cycleWater cycle
2.2.Nitrogen cycleNitrogen cycle
3.3.Oxygen cycleOxygen cycle
4.4.Phosphorus cyclePhosphorus cycle
5.5.Sulfur cycleSulfur cycle
6.6.Carbon cycleCarbon cycle

7. Water cycleWater cycle
What is the water cycle?
Did you know that there is no new water on
Earth?
It all gets recycled and reused in a process that
we call the water cycle. The water cycle is a
way that water moves all around the Earth. It
never stops and doesn't really have a beginning
or an end. It's like a big circle.

8. water is made up of molecules of oxygen and
hydrogen atoms, H2O .As water goes through
its cycle, it can be a solid (ice), a liquid (water),
or a gas (water vapor)
The important thing is that the amount of heat
energy determines whether our H2O molecules
are a solid, liquid or gas. Adding or subtracting
heat energy can cause water to change from one
phase to another , like ice or liquid or gas, And
this is exactly what happens in the water cycle.
.

9. The water cycle is made up of four
main parts:
1.Evaporation
2.Transpiration
3.Condensation
4.Precipitation

10. Evaporation
The vapor rises
Condensation
The Clouds form
Precipitation
The rain falls
Transpiration
The movement through plants

11. 1- Evaporation
Water can be in the atmosphere,Water can be in the atmosphere,
on the land, in the ocean, andon the land, in the ocean, and
even underground.even underground.
Most water vapor gets into theMost water vapor gets into the
atmosphereatmosphere by a process calledby a process called
evaporationevaporation. This process turns. This process turns
the water that is at the top of thethe water that is at the top of the
oceanocean, rivers, and lakes into, rivers, and lakes into
water vapor in the atmospherewater vapor in the atmosphere
using energy from the Sunusing energy from the Sun

12. 2- Transpiration
Process that happens through
plants
As plants absorb water from
the soil, the water moves
from the roots through the
stems to the leaves
Once the water reaches the
leaves, some of it evaporates
from the leaves, adding to
the amount of water vapor in
the air.

14. 3- Condensation
The water vapor rises in theThe water vapor rises in the atmosphereatmosphere and cools,and cools,
forming tiny water droplets. Those water dropletsforming tiny water droplets. Those water droplets
make upmake up cloudsclouds. If those tiny water droplets. If those tiny water droplets
combine with each other they grow larger andcombine with each other they grow larger and
eventually become too heavy to stay in the air. Theneventually become too heavy to stay in the air. Then
they fall to the ground asthey fall to the ground as rainrain,, snowsnow, and other types, and other types
ofof precipitationprecipitation..
condensation

15. 4- Precipitation
Process of when water in the atmosphere falls to
the earth’s surface
Sleet

16. hail
Rain
snow

17. Most of the precipitation thatMost of the precipitation that
falls becomes a part of thefalls becomes a part of the
oceanocean or part of rivers, andor part of rivers, and
lakes, that eventually lead tolakes, that eventually lead to
the ocean. Some of the snowthe ocean. Some of the snow
and ice that falls asand ice that falls as
precipitation stays at the Earthprecipitation stays at the Earth
surface insurface in glaciers and otherand other
types of ice.types of ice. Rainwater is also
soaked up by the soil, through a
process called infiltration. seepsseeps
into the ground and becomes ainto the ground and becomes a
part of the groundwater.part of the groundwater.

20. 4-Water cycling affects the climate,
transports minerals, purifies water,
and replenishes the land with fresh
water.
5-Acts as an agent of energy transfer
and use. Water is a tremendous factor
in neutralizing heat radiations of
sunlight, so also acts as a 'temperature
buffer'.