Photosynthesis & Cellular Respiration �PowerPoint Presentation
(Harcourt Science Book, pages 206-211)
Life Science California Standards Covered:
2f. Students know plants use carbon dioxide (CO2) and energy from sunlight to build molecules of sugar and release oxygen.
2g. Students know plant and animal cells break down sugar to obtain energy, a process resulting in carbon dioxide (CO ) and water (respiration).
How Plants & Animals Get The Energy They Need
Plants make food
(glucose, a type of
sugar) through a
process called
photosynthesis
This sugar
(stored energy)
is sent throughout
the plant for
its cells to use
Animals eat a
plant or another
plant-eater
in order to
obtain the energy
originally stored
in plants
This is how
both plants
and animals
get the
energy they
need to live
and thrive
Any extra sugar
not used by the
plant is stored
somewhere in the
plant (i.e: roots,
stem, leaves, etc.)
Both plants and
animals break down
this sugar into a
form they can use,
in order to release
its stored energy.
This process is called
cellular respiration
What is Photosynthesis?
What is the Purpose of Photosynthesis?
(photo = light & synthesis = putting together)
FACT #1
It is the energy of sunlight that
powers the process of photosynthesis!
FACT #2
The process of photosynthesis
“mostly” only happens in plants
(along with algae and some bacteria)
FACT #3
Photosynthesis takes place in the
chloroplast, inside the plant cells.
In most plants, this occurs in the outermost layer of the leaf (on the top part), though for a few other plants, like cactus, photosynthesis can happen in the cells that are on the stem.
Analogy: Chloroplast as a Food Factory
You can think of a chloroplast as a food factory. Carbon dioxide and water are the raw materials that go into that factory. Sunlight is the energy that changes the raw materials into the product of food, in the form of sugar (or glucose). Finally, the two by-products created in the process, oxygen and a little extra water, are released into the air as they are no longer needed by the plant.
What are the three raw materials �used in Photosynthesis?
1. Carbon Dioxide (CO2) from the air
2. Water (H2O) from the soil
3. Solar energy from sunlight
What are the waste products (by-products) created during Photosynthesis?
These two are released into the air by the plant through the stomata (tiny holes in the undeside of leaves)
What Sequence of Events Takes �Place During Photosynthesis?
(The sugars created during this process are then sent throughout the plant, to all its cells)
What is the Chemical Formula �of Photosynthesis?
12H2O + 6CO2 + Solar Energy makes> C6H12O6 + 6O2 + 6H20
Carbon (energy) (sugar)
Water + Dioxide + Sunlight makes> Glucose + Oxygen + Water
Learn and Sing the Online�Photosynthesis Poem & Song
Illuminating Photosynthesis www.rrojas.com/home/rojassongs/photosynthesissong
What is Cellular Respiration?
What is the Purpose �of Cellular Respiration?
Why is Cellular Respiration �Necessary in Plants & Animals?
What Living Things use �Cellular Respiration?
FACT #1
The process of cellular respiration
takes place in the Mitochondria of both plant and animal cells.
Fact #2
What are the two raw materials �used in Cellular Respiration?
What are the waste products (by-products) created during Cellular Respiration?
In animals these waste products are released into the blood. Carbon Dioxide is carried to the lungs, where it is exchanged for oxygen in the alveoli (and eventually exhaled). Water is carried to the kidneys, where it is removed in urine.
What Sequence of Events Takes �Place During Cellular Respiration?
(ATP is like a battery for the cell. The cell easily
breaks apart ATP whenever it needs energy.)
What is the Chemical Formula �for Cellular Respiration?
(sugar)
Glucose + Oxygen makes> Energy + Carbon Dioxide + Water
C6H12O6 + 6O2 makes> ATP + 6CO2 + 6H20
Did you notice that the equations for photosynthesis and cellular respiration look alike?
(sugar)
Glucose + Oxygen makes > Carbon Dioxide + Water + Energy
CELLULAR RESPIRATION
PHOTOSYNTHESIS
Carbon (energy)
Dioxide + Water + Sunlight makes > Glucose + Oxygen (+ Water)
What are the similarities in their chemical formula?
C6H12O6 + 6O2 makes> 6CO2 + 6H20 + ATP
CELLULAR RESPIRATION
PHOTOSYNTHESIS
6CO2 + 12H20 + Solar Energy makes> C6H12O6 + 6O2 (+ 6H20)
What is the Connection Between �Photosynthesis and Cellular Respiration?
Online Practice Quiz�for Photosynthesis & Cellular Respiration