Transcript Photosynthesis

Photosynthesis
Daily E.Q- How do cells use nutrients to
carry out life’s processes?
• Create word splash with what you
already know about the word
“Photosynthesis”
Photosynthesis
• Share examples of photosynthesis on
white board.
What is it?
• The process through which green plants
and some other organisms use the
energy of the sunlight to make food
• Also the process through which carbon
dioxide and water is used to produce
glucose and oxygen.
What is photosynthesis?
• Plants’ leaves contain chlorophyll
• Chlorophyll (green color) makes
photosynthesis possible
Photosynthesis
• Cells need energy to live, grow,
and reproduce. For most cells,
that energy comes from the Sun.
• Photosynthesis occurs in stages,
but the overall equation is
summarized on the next slide .
Photosynthesis Equation
The chlorophyll absorbs the
sunlight.
The sunlight is combined with water,
Carbon Dioxide and nutrients from
the soil.
CO2
The chlorophyll processes the
ingredients and makes sugar (plant
food) and oxygen.
Sugar + Air
O2
Plants and animals need
each other to survive.
Animals including humans
make the CO2 (carbon
dioxide) plants need.
They (the plants) make the
O2 (oxygen) and food we
need.
Animations
• Holt Science
Bookhttp://www.hrw.com/
T.O.D
• What is
photosynthesis?
A. The process by which
plants make food.
B. The process through
which cells obtain energy
C. The process through
which the Sun transmits
energy.
D. The process through
which cells grow and
divide.
• Photosynthesis
takes place in
A.Nuclei
B.Vacuoles
C.Chloroplasts
D.mitochondria
Cellular Respiration
• The food you eat has to be broken
down so that the energy it contains can
be converted into a form your cells can
use.
• All organisms break down food
molecules in order to release the stored
energy.
• One way uses oxygen and is called
cellular respiration.
Cellular Respiration
• What is it?
The process through which glucose is
broken down in the presence of oxygen
to produce carbon dioxide and water;
the process through which cells break
down simple food molecules to release
stored energy.
Cellular Respiration
• Plants store energy in the food they
produce through photosynthesis. Plants
and organisms get energy from the
food that plants make.
• To get this energy cells break down
simple food molecules to release stored
energy in the cellular respiration
process.
Cellular Respiration Chemical
Equation
Notice any thing about equation?
It is the exact opposite of
photosynthesis
Fermentation
• Another way organisms break
down food molecules to release
stored energy is called
fermentation.
• Process of obtaining energy
without using oxygen.
Fermentation
• One type of fermentation occurs in
muscle cells after strenuous
activity. During activity the
muscle cells uses up oxygen faster
than it can be replaced.
• In order to obtain energy, the cells
conduct lactic acid fermentation.
Fermentation
• Another type of fermentation
occurs in yeast and some other
unicellular organisms that break
down sugars. This type is known
as alcohol fermentation because
alcohol is produced in the process.
Photosynthesis
Cellular Respiration
Fermentation
Def.- Process by which plants
capture light energy from sun and
convert it into sugar
Def. Process of producing ATP
energy in the cell from oxygen and
glucose: releases carbon dioxide and
water.
Def. The breakdown of sugars to
make ATP energy in the absence of
oxygen (anaerobic respiration).
Formula:
6 CO2 + 6 H2O + sunlight
C6 H12O6+ 6 O2
Formula: C6H1206 + 6 O2
6 CO2 + 6 H20
2 Types:
1.Lactic Acid Fermentation
2.Alcohol Fermentation
Where it occurs?
Chloroplast of plant cell
(chlorophyll)
Where it occurs?
Mitochondria of plant and animal cell
Where it occurs?
Cytoplasm of plant and animal cell
Reactants = Products
H2O+CO2= Reactants
Water+Carbon Dioxide
Reactants = Products
C6H12O6+O2= reactants
C6H1206+O2 = products
Glucose+Oxygen
H2O + CO2
Reactants = Products
Glucose+ADP=Lactic Acid+ATP
(lactic acid fermentation)
Glucose+ADP=lactic
acid+ethanol+CO2+ATP
(alcohol fermentation)
How is it related to cellular
respiration? Opposite process
How is it related to
photosynthesis? Opposite process
How is it related to cellular
respiration? All living things use
both processes to release energy
stored in food and produces waste.
Energy Source: SUN Usersplants and plant-like protists
Energy Source: Food- All living
things breathe!
Energy Source: Food- UsersConsumers. Foods made: Bacteria
and yeast
= products
Summary
• Photosynthesis, cellular respiration, and
fermentation are processes necessary
for the survival of organisms.
• Cells need to be supplied with the food
produced during photosynthesis. They
need to remove wastes produced during
cellular respiration
T.O.D
1. Which of these is
required for
cellular
respiration?
A. Carbon dioxide
B. Water
C. Oxygen
D. Light
2. Fermentation differs from
cellular respiration in
that it
• Results in the
production of sugar
• Takes place without
oxygen
• Breaks down sugars in
cells
• Occurs only in plant