PhotosynthesisPhotosynthesis
Plants can make their Plants can make their own food through a own food through a process called process called Photosynthesis.Photosynthesis.
Photo = lightPhoto = light
Synthesis = put togetherSynthesis = put together
Why is this important to Why is this important to you?you?
You eat the plants or the animals whom eat You eat the plants or the animals whom eat the plants so that you can get energy so you the plants so that you can get energy so you can play… work…LIVE!can play… work…LIVE!
Chloroplasts_and_Photosynthesis.mov
StomataStomata
First you need to know about stomata.First you need to know about stomata.
It is part of a leaf where the gas (carbon It is part of a leaf where the gas (carbon dioxide and oxygen) can go in and out of the dioxide and oxygen) can go in and out of the plant (kind of like breathing).plant (kind of like breathing).
StomaStoma
Stoma – opening in the leaf.
Guard cell – controls the opening in the leaf.
The stomata are mainly open during the day.
Why do you think that is?
Plants need sunlight to conduct photosynthesis.
TranspirationTranspiration
Water evaporates from the stomata.Water evaporates from the stomata. It is like the plant is sweating.It is like the plant is sweating. Water does not enter through the Water does not enter through the
stomata. That is the job of the roots. stomata. That is the job of the roots.
PhotosynthesisPhotosynthesis
It is similar to baking a cake.It is similar to baking a cake. You need raw materialsYou need raw materials A chemical reaction happensA chemical reaction happens And you get an end product.And you get an end product.
Raw materialsRaw materials
CakeCake EggsEggs FlourFlour
Baking sodaBaking soda WaterWater
PhotosynthesisPhotosynthesis Water (HWater (H22O) O) roots roots
Carbon Dioxide Carbon Dioxide (CO(CO22) ) stomata stomata
Sunlight Sunlight leaves/green stemsleaves/green stems
Chemical reactionChemical reaction
CakeCake
Oven set at 350Oven set at 350° F ° F for 30 minutes.for 30 minutes.
PhotosynthesisPhotosynthesis occurs with the help occurs with the help
of of Chlorophyll Chlorophyll
Chlorophyll:Chlorophyll: Found in Found in chloroplastschloroplasts
in the cells of the in the cells of the leavesleaves
Makes leaves greenMakes leaves green
End ProductEnd Product
Cake:Cake: CakeCake
(Chocolate cake, with (Chocolate cake, with chocolate icing, with chocolate icing, with chocolate ice cream, chocolate ice cream, with… with… ) )
Photosynthesis: Photosynthesis: Glucose (CGlucose (C66HH12120066) = ) =
sugar = foodsugar = food Oxygen (6OOxygen (6O22))
Photosynthesis Chemical Photosynthesis Chemical formulaformula (chlorophyll)(chlorophyll)
6 CO6 CO22 + 6 H + 6 H22O + light --------------O + light -------------- C C66HH1212OO66 + 6 O + 6 O22
Plants store the glucose (sugar) in Plants store the glucose (sugar) in its roots for food for the winter.its roots for food for the winter. Cool nights and shorten days Cool nights and shorten days
trigger this. trigger this.
The chlorophyll breaks down and The chlorophyll breaks down and the real colors of the leaves are the real colors of the leaves are revealed.revealed.
Eating carrots is eating stored Eating carrots is eating stored energy in roots.energy in roots.
BibliographyBibliography
North Carolina Holt Science & Technology, North Carolina Holt Science & Technology, Holt, Rinehart, and Winston, USA, 2005Holt, Rinehart, and Winston, USA, 2005
Farabee, Photosynthesis, Farabee, Photosynthesis, http://www.emc.maricopa.edu/faculty/farabee/bhttp://www.emc.maricopa.edu/faculty/farabee/biobk/biobookps.html iobk/biobookps.html accessed 6/3/10 accessed 6/3/10
Discovery Education, Discovery Education, http://streaming.discoveryeducation.com/http://streaming.discoveryeducation.com/ accessed 6/10/10accessed 6/10/10