Photosynthesis is the process by which plants, algae, and some bacteria use sunlight, water and carbon dioxide to produce glucose and oxygen. It occurs in two stages - the light-dependent reaction which uses sunlight to produce ATP and NADPH through the electron transport chain in the chloroplast, and the light-independent reaction (Calvin cycle) which uses the ATP and NADPH to incorporate carbon from carbon dioxide into organic compounds to produce glucose. Photosynthesis is essential for life on Earth as it provides the oxygen needed for respiration and removes carbon dioxide from the atmosphere.

1. Photosynthesis
The process of making Glucose (energy source for most cells) and Oxygen
(sustainable for life) from converting sunlight to energy (using water and
carbon dioxide). The special organelle within the plant that causes this to
happen is called chloroplast

2. Photosynthesis has 2 stages
Light dependent reaction &
Light independent reaction
(Dark)
Also referred to as the
Calvin Cycle.
Photosynthesis provides oxygen for
all living things to breathe.

3. The light Dependent Reaction-
This reaction begins with sunlight.Photons from the sun
illuminate the leaf and enter though it to the chloroplast
and the leaf's thylakoid disks. The disks then stimulate the
chlorophyll and activate electrons,water is then split into
oxygen and hydrogen ions causing the releasing of
electron.This process is how the chlorophyll gets
replenished and where the oxygen we use to breath is
generated.

4. The Electrons move through electron carriers (known as the
Transport Chain) to accumulate hydrogen ions that are
generating a proton gradient inside the thylakoid compartment.
The protons decrease their concentration gradient though the
ADP synthases.The ADP and PI come together and form ATP
(Adenosine triphosphate). The ATP is an energy molecule that cells
exchange to release energy.

5. The electronspassing throughthe electron
transport chaincombinewith NADP+ to form
NADPH (nicotinamideadeninedinucleotide
phosphate). The outcomeof the light reaction is
the production of Oxygen, released from the
leaves, ATP, and NADPH.
This Photo by Unknown author is licensed under CC BY-SA-NC.

6. Light-Independent Reaction(Dark)
Calvin Cycle.
This reaction can happen in the light as well as
the dark. The process uses energy from a light
reaction to turn carbon dioxide into glucose,
though a series of reactions, starting with 3 RuBP
(ribulose bisphosphate) and eventually ends up
with the same molecule,while producing
glucose. The series of reactions start and end with
the same molecule,RuBP. This cycle is known as
the Calvin Cycle.
This Photo by Unknown author is licensed under CC BY.

7. The completeProcess reaction needs 6 carbon dioxide, and 6 water
molecules, powered by the sun's energy to produce glucose and 6
oxygen molecule. Without Photosynthesis there would be no oxygen to
breathe because there would be no trees or plants to produce oxygen.
Most organism's on Earth would disappear (includinghumans). The
Earth is sustainablefor living because of Photosynthesis.

8. This Photo by Unknown author islicensedunder CCBY-SA.