Transcript Photosynthesis - Buncombe County Schools System

Photosynthesis
Kim Lachler
NCES 6 L 1.2
2010
Photosynthesis
 Plants can make their
own food through a
process called
Photosynthesis.
 Photo = light
 Synthesis = put together
Why is this important to
you?
 You eat the plants or the animals whom eat
the plants so that you can get energy so you
can play… work…LIVE!
Chloroplasts_and_Photosynthesis.mov
Stomata
 First you need to know about stomata.
 It is part of a leaf where the gas (carbon
dioxide and oxygen) can go in and out of the
plant (kind of like breathing).
Stoma
Stoma –
opening in the
leaf.
The stomata are mainly open during the day.
Why do you think that is?
Plants need sunlight to conduct photosynthesis.
Guard cell –
controls the
opening in
the leaf.
Transpiration
 Water evaporates from the stomata.
 It is like the plant is sweating.
 Water does not enter through the
stomata. That is the job of the roots.
Photosynthesis




It is similar to baking a cake.
You need raw materials
A chemical reaction happens
And you get an end product.
Raw materials
Cake
 Eggs
 Flour
 Baking soda
 Water
Photosynthesis
 Water (H2O)  roots
 Carbon Dioxide
(CO2)  stomata
 Sunlight 
leaves/green stems
Chemical reaction
Cake
 Oven set at 350° F
for 30 minutes.
Photosynthesis
 occurs with the help
of Chlorophyll
Chlorophyll:
 Found in chloroplasts
in the cells of the
leaves
 Makes leaves green
End Product
Cake:
 Cake
(Chocolate cake, with
chocolate icing, with
chocolate ice cream,
with…  )
Photosynthesis:
 Glucose (C6H1206) =
sugar = food
 Oxygen (6O2)
Photosynthesis Chemical
formula
(chlorophyll)
6 CO2 + 6 H2O + light -------------- C6H12O6 + 6 O2

Plants store the glucose
(sugar) in its roots for food for
the winter.
 Cool nights and shorten
days trigger this.

The chlorophyll breaks down
and the real colors of the
leaves are revealed.

Eating carrots is eating stored
energy in roots.
Quiz
Video_Quiz__Photosynthesis.mov
Bibliography
 North Carolina Holt Science & Technology,
Holt, Rinehart, and Winston, USA, 2005
 Farabee, Photosynthesis,
http://www.emc.maricopa.edu/faculty/farabee/b
iobk/biobookps.html accessed 6/3/10
 Discovery Education,
http://streaming.discoveryeducation.com/
accessed 6/10/10