All Living
Things
Require
Cellular
Energy.
Law of Conservation of Energy

Energy is never created or destroyed it can
only be transformed from one form to
another.
Energy for living things comes from
the sun in the form of light.
Photosynthesis

Photosynthesis changes light energy into
chemical energy that organisms can use to
do work.
Autotrophs including plants, algae and
some prokaryotes.

Have Chloroplasts that use light energy,
CO2, and H2O to make carbohydrates that
can be used as a source of chemical energy
and the oxygen we breathe in our
atmosphere.
All living things use chemical energy
to power cells.
Cellular Respiration

The aerobic process that allows organisms to
store chemical energy when bonds are
formed and then release energy when bonds
are broken.
Heterotrophs most plants and animals
including humans

Have Mitochondria to change carbohydrates
and oxygen into a different chemicals called
ATP (adenosine triphosphate) and water
during cellular respiration and fermentation.
Fermentation
The anaerobic process that makes ATP when there
is not enough oxygen in cells for respiration. It
happens at night in plants when there is no light.
In people it make muscles sore by producing
lactic acid.
In yeasts it makes bread rise.
In some bacteria it makes biofuels.
Chemosynthesis

Some extreme bacteria use chemicals in their
environment to make energy.
The Connection Between Photosynthesis and Respiration
Where does photosynthesis occur?
Photosynthesis occurs in the
________
leaves of a plant. More
specifically- in the ___________.
chloroplasts
Inside of the chloroplast
 _____________
Chlorophyll is
found in the
chloroplasts.
 Chlorophyll is the
___________
pigment that
makes the plant
_________.
green
 Chlorophyll
__________
absorbs light
energy.
Photosynthesis reactants and products:
Plants use the ______
light energy captured
by chlorophyll to change carbon
______ dioxide
______
and _______
water into food.
The food is in the form of a sugar called
__________
(C6H12O6).
glucose
Photosynthesis also produces ________.
oxygen
EQUATION FOR
PHOTOSYNTHESIS
Inside the Mitochondria
 During cellular respiration, The mitochondria
use oxygen to produce energy from food.
 Food (glucose) is broken down into; CO2
and H2O, and energy is released.
 The released energy is used to form ATP,
which supplies energy for all cell activities.
 It is also used to maintain body temperature
in animals.
EQUATION FOR
RESPIRATION
REACTANTS 
PRODUCTS
Scientist Notebook Drawings
 Draw the Carbon Dioxide/Oxygen Cycle :
 Draw a plant to represent the plant cell. Draw an enlargement of a chloroplast in the
plant. Label the thylakoid, grana, the light dependent and light independent reaction.
(Calvin Cycle)
 Draw an animal to represent the animal cell.
 Draw arrows with chemical formulas.
 Draw the sun and other inputs with an arrow.
 Draw the mitochondria, ATP, and other outputs with an arrow.
 Include Photosynthesis and Respiration explanations.
 Draw, color, and label figure.