Presentation on theme: "Video Eyewitness Plant Watch video and answer the questions."— Presentation transcript:
1 VideoEyewitness PlantWatch video and answer the questions
2 4.2/4.3 Intro to Photosynthesis Set up Cornell Notes on pg. 41Topic: 4.2/4.3 Intro to PhotosynthesisEssential Question:What are the roles of chloroplasts and chlorophyll in photosynthesis?4.2/4.3 Intro to Photosynthesis2.1 Atoms, Ions, and MoleculesWhat are the roles of chloroplasts and chlorophyll in photosynthesis?Key Concept: The overall process of photosynthesis produces sugars that store chemical energy
3 CA StandardThe fundamental life processes of plants and animals depend on a variety of chemical reactions that occur in specialized areas of the organism’s cells.1.F Know usable energy is captured from sunlight by chloroplasts and is stored through the synthesis of sugar from carbon dioxide.
4 Pg. 40Discussion QuestionsImagine you just planted beautiful roses in your garden. What materials are crucial to the roses’ survival? In other words, what do the roses need to stay alive?
5 Water (H20) Sunlight Carbon Dioxide (CO2) Soil What materials are crucial to the roses survival? In other words, what do the roses need to stay alive?
6 KEY CONCEPT The overall process of photosynthesis produces sugars that store chemical energy.
7 List a few things that use energy from sunlight. Pg. 40
8 Solar powered homes, cars, and calculators are just a few things that use energy from sunlight. In a way you are solar powered. Although the sun does not directly give you the energy.
10 photosynthesis: Stores energy from sunlight in glucose How do we, as humans, get our chemical energy?Pg. 40photosynthesis: Stores energy from sunlight in glucosecellular respiration: breaks down glucose to release stored energy in the form of ATP
11 Photosynthesis is a process that captures energy from sunlight to make sugars that store chemical energy. Therefore, directly or indirectly, the energy for almost all organisms begins as sunlight.ReactantsProducts(Sugar)
12 Photosynthetic organisms are producers. Producers make their own source of chemical energy (they make their own food).Ex: Plants
18 The equation for photosynthesis is: 6CO2 + 6H2O C6H12O6 + 6O2 Carbon dioxide water light, enzymes a sugar oxygenC6H12O6granum (stack of thylakoids)thylakoidsunlight1 six-carbon sugar6H2O6CO26O2chloroplast1243energystroma (fluid outside the thylakoids)
19 The equation for photosynthesis is: 6CO H2O C6H12O O2How many Cs?
20 The equation for photosynthesis is: 6CO H2O C6H12O O2How many Cs?
21 The equation for photosynthesis is: 6CO H2O C6H12O O2How many Cs?How many Os?
22 The equation for photosynthesis is: 6CO H2O C6H12O O2How many Cs?How many Os?
23 The equation for photosynthesis is: 6CO H2O C6H12O O2How many Cs?How many O2s?How many Hs?
24 The equation for photosynthesis is: 6CO H2O C6H12O O2How many Cs?How many Os?How many Hs?
25 The equation for photosynthesis is: 6CO2 + 6H2O C6H12O6 + 6O2 Carbon dioxide water light, enzymes a sugar oxygenC6H12O6granum (stack of thylakoids)thylakoidsunlight1 six-carbon sugar6H2O6CO26O2chloroplast1243energystroma (fluid outside the thylakoids)
27 4.2/4.3 Photosynthesis: Light Dependent Reactions Set up Cornell Notes on pg. 43Topic: 4.2/4.3 Light Dependent ReactionsEssential Question:How do the two photosystems work together to capture energy from sunlight?4.2/4.3 Photosynthesis: Light Dependent Reactions2.1 Atoms, Ions, and MoleculesHow do the two photosystems work together to capture energy from sunlight?Key Concept: Photosynthesis requires a series of chemical reactions
28 What are the reactants and products of photosynthesis? SpongeWhat are the reactants and products of photosynthesis?
29 Reactants: (What do we need for photosynthesis? SunlightH2O waterCO2 carbon dioxideProducts:O2 oxygenGlucose (sugar)The equation for photosynthesis is:6CO H2O C6H12O O2
30 Light-dependent reactions capture energy from sunlight (The reactions depend on light!).
32 Light Dependent reactions- take place in the thylakoids Sunlight is absorbed by chlorophyll6 H2O (water) molecules are broken downH+, e-, O26 O2 (oxygen) are released as wasteThe energy is carried by ATP and NADPH molecules to fuel the light independent reactionsLIGHT DEPENDENT IN A NUTSHELL
33 All 7 parts of Light-Dependent Reactions ClassworkOn pg. 42:Make a flow map which includes the reactants and products of light dependent reactionsAll 7 parts of Light-Dependent ReactionsLabel Photosystem II and Photosystem I
34 LIGHT –DEPENDENT REACTIONS Pg. 42 INB Pg. 109-110 in book REACTANTS1.3.2.NamePRODUCTS18.104.22.168.Name
35 Photosystem II 1. Chlorophyll absorbs energy from sunlight The energy is transferred to electrons (e-) in the chlorophyllThese high energy electrons enter an Electron Transport Chain
36 2.Water molecules split:Oxygenreleased as wasteHydrogenHydrogen ions (H+)Electrons (e-)The electrons from the water replace the electrons lost from the chlorophyll in step 1
37 3.Electrons move from protein to protein in the ETCTheir energy is used to pump the (H+) inside the thylakoid (against the concentration gradient)H+ build up inside the thylakoid
38 Photosystem I 4. Absorb energy from sunlight Electrons are energized and leave the chlorophyllThe e- on the ETC in Photosystem II will replace the e- lost in step 4
39 5.The energized electrons are added to a molecule called NADP+ (like ADP)
40 5.The energized electrons are added to a molecule called NADP+ (like ADP)A molecule of NADPH (like ATP) is madeNADPH will continue to the Light-Independent reactions
41 6.H+ ions have built up inside the thylakoid from Photosystem II (more inside than outside)H+ flow though a protein channel through diffusion
42 7.As H+ flow though the protein channel…ATP synthase makes ATP by adding phosphates to ADPATP will move on to the Light-Independent Reactions
45 LIGHT -DEPENDENT REACTIONS H2O REACTANTS Sunlight Photosystem II 1. Energy is absorbed from sunlight by chlorophyll- Electrons enter E.T.C.3. Electrons move through the ETC-Hydrogen ions (H+) transported inside thylakoid2. Water molecules split: H+, Electrons, and O2Photosystem IISunlightOxygenReleased as wastePRODUCTS4. Chlorophyll absorbs more energy from sunlight. Electrons leave to the ETC5.Electrons added to NADP+ to make NADPHNADPHPhotosystem I6. Hydrogen Ions diffuse out of the thylakoid through a protein channel7. As H+ ions flow through the protein channel, ATP is madeATP
46 Please close notebooks….. Light-Dependent Reactions Order GameIn pairs, put the Light-Dependent Reactions in order1st 3 groups: Gets a treat!!!!
48 4.2/4.3 Photosynthesis: Light Independent Reactions Set up Cornell Notes on pg. 45Topic: 4.2/4.3 Photosynthesis: Light Independent ReactionsEssential Question:Explain the relationship between light-dependent and the light-independent reactions.4.2/4.3 Photosynthesis: Light Independent Reactions2.1 Atoms, Ions, and MoleculesExplain the relationship between light-dependent and the light-independent reactions.
49 The energy from both NADPH and ATP is used to make sugars during light-independent reactions. Light-Dependent Reactions
50 The light-independent reactions use energy from light-dependent reactions to make sugars. takes place in the stromaneeds 6 CO2 (Carbon Dioxide) from atmosphereuses light-Dependent ATP/NADPH (energy) to build a sugar molecule which stores some of the energy that was captured from sunlightLIGHT INDEPENDENT IN A NUTSHELL
52 The energy from the light dependent reactions is used for a series of reactions called the Calvin Cycle.Calvin Cycle: uses carbon dioxide CO2 gas from the atmosphere and the energy carried by ATP and NADPH to make simple sugars.16-carbon sugar made
53 1. a CO2 molecule is added to a 5-carbon molecule already in the Calvin Cycle. A 6-carbon molecule is formed1.+
54 2. ATP and NADPH are used to split the six-carbon molecules Two 3-Carbon molecules are formed2.+
55 3. Most of the 3-Carbon molecules stay in the Calvin Cycle One high energy 3-Carbon molecule leaves the cycle for every 3 CO2 molecules that enter the cycle (3 turns)After two leave (6 turns), they bond together, forming a 6-Carbon sugar moleculeThis one has been waiting…3.+
56 These will be added to CO2 and the cycle continues… 4. Energy from ATP is used to change the remaining carbon molecules back into 5-carbon moleculesThese will be added to CO2 and the cycle continues…This one has been waiting…3.+