Photosynthesis
 Energy
cannot be created or destroyed, it
can only be transformed
 All
organisms need carbohydrates for
energy conversion
What organelle is produces
cellular energy?
 Glucose
C6H12O6 is a carbohydrate
 Autotrophs
are capable of making their
own carbohydrates
 Heterotrophs
are not capable of making
their own carbohydrates and therefore
must get them by some other means
Why do we have to eat to get
energy?
What form is cellular energy
in?
 Carbohydrates
are made in the
chloroplast in a process called
photosynthesis
 Plants
and other photosynthetic organism
are green because they contain the
pigment chlorophyll
 Light
from the sun contains all the colors
of the spectrum (rainbow).
Chlorophyll absorbs all the colors except for
green.
The wavelength of light that is green is
reflected. That is why we see plants as
green
What carbohydrate do plants
make?
We get energy from the sun.
This energy is in the form of
Photosynthesis:
Plants use the
energy from sunlight to convert
water (H2O) and carbon
dioxide (CO2) into high-energy
carbohydrates
Photosynthesis Equation:
6CO2
Sunlight
+ 6 H2O -> C6H12O6 + 6 O2
Reactants (what goes in)
 Carbon
 Water
dioxide
Products (when the reaction is
done)
Glucose
 Oxygen

Elodea Lab
 http://www.syngenta.com/country/uk/en
/learning-zone/sciencelab/experiments/Pages/Photosynthesis_in
_Action.aspx