OXYGEN CYCLE
Dr. B. K. Bindhani
Assistant Professor
KIIT School of Biotechnology
KIIT University, Bhubaneswar, Orissa, India
The Oxygen Cycle
IDEALIZED DIAGRAM ILLUSTRATING PHOTOSYNTHESIS FOR A
GREEN PLANT (TREE) AND GENERALIZED REACTION.
PHOTOSYNTHESIS
• The process by which light energy is
converted to chemical energy.
WEATHERING
Physical and
chemical
process in
which solid
rock exposed
at earths
surface is
changed to
separate solid
particles and
dissolved
materials
RESPIRATION & DECAY
Mechanisms in
which animal
life and
bacteria
consume
oxygen and
release
carbon
dioxide
BURIAL
The oxygen
left inside
of people
after they
have been
buried in
the ground
gets
absorbed
by the soil.
PHOTOLYSIS
The
chemical
decompos
ition of
materials
under the
influence
of light
PLANTS
• The oxygen cycle
starts off in plants.
• Plants
use
photosynthesis
to
produce.
carbohydrates
and
oxygen
• Plants “breathe” in
carbon dioxide and
“breathe” out oxygen.
Water
When the water in a steam enters a pond, microorganisms in the pond begin
to break down organic matter, consuming oxygen in the process
ORGANISM
• Last in the cycle are
the organisms.
• Their role in the
cycle begins with
carbon dioxide in
the atmosphere.
• Animals
breathe
that oxygen and
both plants and
animals use the
sugars for energy.