2 Lab Observation Seven plants are placed in separate boxes Each plants are exposed to a different color light (different color cellophane that will cover them)Daily observations of the growth (height) of the plant and the number and size of its leaves will be recorded on the lab sheetThis lab will take a period of 8 days
3 ReviewAll living organisms require energy to carry out their life activitiesLiving organisms obtain their energy by releasing the chemical bond energy stored in organic moleculesFood products are the raw materials containing organic compounds
4 Continue ReviewGreen plants receive their color because of the presence of the green pigment chlorophyll. The molecular structure of chlorophyll and the enzymes contained in the chloroplast allow the plant to capture the energy of the sun (solar energy) and to use this energy to convert water and carbon-dioxide to basic carbohydrates.
5 WHAT IS PHOTOSYNTHESIS? Photosynthesis is a process that in reality consists of two sets of reactions. The first reaction, known as the light reaction utilizes light energy to split water into hydrogen ions and oxygen gas. ATP and hydrogen ions produced in the light reaction (photolysis) is used in the second reaction, carbon fixation or the dark reaction.The dark reactions use ATP and hydrogen ions from the light reaction to convert atmospheric carbon dioxide into glucose.The process of photosynthesis is a chemical reaction.It is the most important chemical reaction on our planet.
6 WHAT IS THE EQUATION FOR THE CHEMICAL REACTION OF PHOTOSYNTHESIS? Light energyCarbon dioxide + Water Glucose + oxygen
7 What is the equation for the chemical reaction of photosynthesis? Six molecules of carbon dioxide react with six molecules of water to form 1 molecule of glucose and six molecules of oxygen.
8 DESCRIBE PHOTOSYNTHESIS The process of changing light energy to chemical energyEnergy stored as sugarOccurs in plants and some algaePlants need light energy, carbon dioxide and waterTakes place in the chloroplasts, using chlorophyll, the green pigment in plants
9 What happens during photosynthesis? Plants capture light energy and use that energy to make glucoseSunlight provides the energy needed by chlorophyll to change molecules of carbon dioxide and water into glucoseOxygen is also released in this reaction
11 What happens during photosynthesis Carbon dioxide enters the leaf through holes called stomataCarbon dioxide combines with the stored energy in the chloroplasts through a chemical reaction to make glucoseThe sugar is moved through tubes in the leaf to the roots, stems and fruits of the plantsSome of the sugar is used right away by the plant for energy; some is stored as starch; and some is built into plant tissue
12 Why is this important to us? We cannot make our own food (glucose, energy), we must get our food from plants.Plants are the first step in the food chain.Plants are able to use a source of energy, such as sunlight, to provide food directly form simple inorganic molecules are known as autotrophs.
13 Why is this important to us? The oxygen released during photosynthesis is necessary for all living thingsvideo wrap up
15 The dark reactions do not require direct light Dark reaction occurs in the stromaCarbon dioxide is converted to sugar using ATP and NADPH. This process is known as Carbon Fixation or the Calvin Cycle.
17 Carbon dioxide is combined with a 5 carbon sugar creating a 6 carbon sugar The 6 carbon sugar is eventually broken down into two molecules called glucose and fructose. These two molecules make sugar
18 SummaryPhotosynthesis is a process in which light energy is converted to chemical energy. It means “Putting Together with Light.”This process requires Sunlight as a source of energy.In plants, photosynthesis occurs within the chloroplasts where the green pigment chlorophyll can be found.
19 Photosynthesis consists of two stages: a. The Light Reactionb. The Dark ReactionLight Reaction converts light into energy (ATP and NADHP)Dark Reaction uses the energy and carbon dioxide to produce sugar