PhotosynthesisPhotosynthesis

Kim Lachler

2010NCES 6 L 1.2

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.

QuizQuizVideo_Quiz__Photosynthesis.movVideo_Quiz__Photosynthesis.mov

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