Photosynthesis Kim Lachler 2010 NCES 6 L 1.2

Photosynthesis Plants can make their own food through a process called Photosynthesis. Plants can make their own food through a process called Photosynthesis. Photo = light Photo = light Synthesis = put together 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! You eat the plants or the animals whom eat the plants so that you can get energy so you can play… work…LIVE!

Stomata First you need to know about 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). 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. 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.

Transpiration 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 stomata. That is the job of the roots. Water does not enter through the stomata. That is the job of the roots.

Photosynthesis It is similar to baking a cake. It is similar to baking a cake. You need raw materials You need raw materials A chemical reaction happens A chemical reaction happens And you get an end product. And you get an end product.

Raw materials Raw materials Cake Eggs Eggs Flour Flour Baking soda Baking soda Water WaterPhotosynthesis Water (H 2 O) roots Water (H 2 O) roots Carbon Dioxide (CO 2 ) stomata Carbon Dioxide (CO 2 ) stomata Sunlight leaves/green stems Sunlight leaves/green stems

Chemical reaction Cake Oven set at 350° F for 30 minutes. Oven set at 350° F for 30 minutes.Photosynthesis occurs with the help of Chlorophyll occurs with the help of Chlorophyll Chlorophyll: Chlorophyll: Found in chloroplasts in the cells of the leaves Found in chloroplasts in the cells of the leaves Makes leaves green Makes leaves green

End Product Cake: Cake Cake (Chocolate cake, with chocolate icing, with chocolate ice cream, with… ) (Chocolate cake, with chocolate icing, with chocolate ice cream, with… )Photosynthesis: Glucose (C 6 H ) = sugar = food Glucose (C 6 H ) = sugar = food Oxygen (6O 2 ) Oxygen (6O 2 )

Photosynthesis Chemical formula (chlorophyll) (chlorophyll) 6 CO H 2 O + light C 6 H 12 O O 2

Plants store the glucose (sugar) in its roots for food for the winter. Plants store the glucose (sugar) in its roots for food for the winter. Cool nights and shorten days trigger this. Cool nights and shorten days trigger this. The chlorophyll breaks down and the real colors of the leaves are revealed. The chlorophyll breaks down and the real colors of the leaves are revealed. Eating carrots is eating stored energy in roots. 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 North Carolina Holt Science & Technology, Holt, Rinehart, and Winston, USA, 2005 Farabee, Photosynthesis, iobk/biobookps.html accessed 6/3/10 Farabee, Photosynthesis, iobk/biobookps.html accessed 6/3/10 iobk/biobookps.html iobk/biobookps.html Discovery Education, accessed 6/10/10 Discovery Education, accessed 6/10/10