Photosynthesis Kim Lachler 2010 NCES 6 L 1.2

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!

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. 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. 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

Why Leaves Change Color in the Fall 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/biobk/biobookps.html accessed 6/3/10 Discovery Education, http://streaming.discoveryeducation.com/ accessed 6/10/10