Presentation on theme: "Provides Energy to make LIFE possible!"— Presentation transcript:
1 Provides Energy to make LIFE possible! PhotosynthesisProvides Energy to makeLIFE possible!
2 What is Photosynthesis? Photosynthesis is a chemical reaction in which light energy is converted to chemical energy (stored in glucose). Photosynthesis = chemical reactionLight E Chemical E (stored in glucose)Living things can eat glucose, we can't eat sunlight.
3 Why is Photosynthesis important? Converts Energy into a form that makes LIFE possible!Living things can't eat sunlight, but they can eat glucose!
4 Who carries out photosynthesis? Autotrophes containing the green pigment, chlorophyll. This includes:The plant kingdom,“Half" of the Protista (the algae)“Half" the Moneran Kingdom (the blue-green algae).
5 Where does photosynthesis occur? Most photosynthesis is occurring in the oceans! (The ocean covers 70% Earth)leaves of plants. chloroplasts
6 How can we summarize photosynthesis? In words:carbon dioxide + water + light energy glucose + oxygen + waterAs a chemical reaction:CO2 + H2O + light energy C6H12O6 + O2 + H2O
7 What raw materials are needed for the process of photosynthesis? chlorophyllSunlightwatercarbon dioxide
8 How does the structure of a plant help maintain homeostasis? SunlightAbsorbed by the chlorophyll in each chloroplast!Chloroplasts are found in the Palisade layer of a leaf!
9 CO2 diffuses in through the stomata O2 diffuses out through the stomata
10 H2O is taken in through the xylem tissue H2O transpires (exits) through the stomata
11 Glucose produced during photosynthesis is pushed through the phloem to other parts of the plant that needs food!
14 More in-depth… Inside a chloroplast…Light Dependent Reaction Thylakoids are arranged in stacks called grana.The chlorophyllinside the granaabsorbs light –blue and red.Water and O2 isabsorbed.ATP is produced.
15 Light Independent Reaction (Dark Reaction) (Calvin Cycle) Uses CO2 and ATP to produce high energy sugar.ADPATP
17 Factors that affect the rate of photosynthesis… Amount of water availableTemperature (Enzymes! 0-35 °C)Intensity of light (not too much, not too little!)
18 How do plants maintain homeostasis? Cuticle – prevents water lossguard cells
19 Exactly why is photosynthesis so important? Two big reasons: glucose (sugar)oxygen
20 What else is so great about sugar? Dehydration synthesis = cellulosestarch
21 To which "life function" is photosynthesis related? nutrition, autotrophic nutritionNutrition = how organisms obtain the materials necessary for energy, growth, etc. Autotrophic Nutrition
22 What else should we remember about photosynthesis? Oxygen-Carbon Dioxide Cycle. oxygen factoriesremoving CO2 from the atmosphere. Increasing levels of CO2 = increasing global temperature ("Global Warming")Damaging the ecosystems where photosynthesis occurs (i.e. the rainforests, the oceans)…Reduces O2 being producedReduces CO2 being removed
23 Energy formed stored in bonds of ATP (adenine triphosphate)