3 Word Dissection: Chloroplast Chloro- green-plast small bodyA chloroplast is a small green body in a plant cell. (organelle)
4 Chloroplast http://www.youtube.com/watch?v=pFsty-XyLZc Chloroplasts can move around near the surface of the cell to take advantage of how bright the sunlight is and from which direction it is coming
5 Chlorophyll Green pigment in plants Gives plants their green color Absorbs light energy from the sunEnergy is used to power the process of photosynthesis-phyll - means leaf
6 Please write and answer in your journal: What is the process of photosynthesis?Summarize in your science journal your understanding of photosynthesis – including the things plants need to complete the process
9 Leaf PigmentOther pigments in leaves – yellows, purples, reds, and orangesThe amount of green pigment called chlorophyll produced depends the amount of light the plant receivesThe green color chlorophyll hides the other pigmentsIn the fall, there is less sunlight and temperatures decrease and chlorophyll is not produced.This allows other colors to show in the leavesUntamed Science – Why leaves change colorInvestigationTexas Parks and Wildlife
12 Stomata Special pores that allow the exchange of gases (CO2, O2 ) and releasing H2O (water vapor)Stomata pores are surrounded by guard cellsGuard cells expand or shrink to open or close the stomata (balloon demo)Guard cells close when dehydrated. This helps conserve water for the plantMost stomata are on the bottom of the leaf
13 The stomata areimportant to theprocess ofphotosynthesis.this is the site wherecarbon dioxide istaken into the plantand oxygen and watervapor is released.
14 PhotosynthesisChallenge: dissect the word and try to infer its meaning
20 Discuss answers to the questions below with your table partners Why is photosynthesis important to all life on the Earth?What happens when light energy from the Sun is used for the process of photosynthesis?
21 PhotosynthesisRadiant energy from the Sun is converted into chemical energy (glucose)Plants use and store glucoseAnimals eat the plants and use the stored glucose for energyOxygen produced in the process is used by animals in respiration.Carbon dioxide produced by animals is used by plants
22 Questions What would happen if the process of photosynthesis stopped? Why is photosynthesis necessary for life on the Earth to continue?How do energy and matter interact in the photosynthesis process?Which three types of organisms can produce their own food through photosynthesis?