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This presentation gives an overview on photosynthesis and respiration. Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that, through cellular respiration, can later be released to fuel the organism's activities.
1.
Photosynthesis &
Respiration
2.
Overview of photosynthesis
and respiration
SUN
RADIANT
ENERGY
PHOTOSYNTHESIS RESPIRATION CELL
ACTIVITIES
GLUCOSE ATP(ENERGY)
3.
• Organisms that use light energy from the sun to
produce food—autotrophs (auto = self)
Ex: plants and some microorganisms (some bacteria
and protists)
4.
• Organisms that CANNOT use the sun’s energy to
make food—heterotrophs
Ex: animals and most microorganisms
5.
•Photosynthesis is the process by which the energy of
sunlight is converted into the energy of glucose
6.
What is Photosynthesis?
The process of photosynthesis is a
chemical reaction.
It is the most important
chemical reaction on our planet.
7.
What is the Equation for the
Chemical Reaction of
Photosynthesis?
8.
What is the equation for the
chemical reaction of
photosynthesis?
9.
EQUATION FOR
PHOTOSYNTHESIS
WATER OXYGEN
6CO2 + 6H2O +ENERGY C6H12O6 + 6O2
CARBON GLUCOSE
10.
Describe Photosynthesis
11.
Describe Photosynthesis
• The process of changing light energy to
chemical energy
• Energy stored as sugar
• Occurs in plants and some algae
• Plants need light energy, CO2, and H2O
• Takes place in the chloroplasts, using
chlorophyll, the green pigment in plants
12.
• Chlorophyll is the pigment inside the chloroplast that
absorbs light for photosynthesis
As the chlorophyll in leaves
decays in the autumn, the green
color fades and is replaced by the
oranges and reds of carotenoids,
other pigments.
13.
What happens during
photosynthesis?
14.
What happens during
photosynthesis?
• Plants capture light energy and use that
energy to make glucose
• Sunlight provides the energy needed by
chlorophyll to change molecules of carbon
dioxide and water into glucose
• Oxygen is also released in this reaction
15.
What happens during
photosynthesis?
• Carbon dioxide
enters the leaf
through holes called
stomata
• CO2 combines with
the stored energy in
the chloroplasts
through a chemical
reaction to make
glucose
16.
• Photosynthesis occurs in the chloroplasts of plants
17.
What happens during
photosynthesis?
• The sugar is moved through tubes in the leaf to
the roots, stems and fruits of the plants
• Some of the sugar is used right away by the
plant for energy; some is stored as starch; and
some is built into plant tissue
18.
Why is this important to us?
19.
Why is this important to us?
We cannot make our own food (glucose,
energy), we must get our food from plants.
Plants are the first step in the food chain.
20.
Why is this important to us?
The oxygen released during photosynthesis
is necessary for all living things.
21.
What is Cellular Respiration?
22.
What is Cellular Respiration?
The release of chemical energy for use by
cells.
23.
What is Cellular Respiration?
Once the energy that was in sunlight is
changed into chemical energy by
photosynthesis, an organism has to
transform the chemical energy into a a
form that can be used by the organism.
This process is cellular respiration.
24.
Cellular Respiration:
Cellular respiration is the process by which the energy of
glucose is released in the cell to be used for life processes
(movement, breathing, blood circulation, etc…)
25.
• Respiration occurs in ALL cells and can take place
either with or without oxygen present.
26.
Describe Cellular Respiration
27.
Describe Cellular Respiration
• The breakdown of glucose molecules to
release energy
• Turns glucose into ATP
• Takes place in all living things
• Is a step by step process
28.
What is the chemical equation
for cellular respiration?
29.
EQUATION FOR
RESPIRATION
CARBON
GLUCOSE DIOXIDE ATP
C6H12O6 + 6O2 6CO2 6H2O + ENERGY
OXYGEN + WATER
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