Todays Objectives I will define and classify two
Today’s Objectives § I will define and classify two types of metabolism: photosynthesis and cellular respiration § I will compare and contrast photosynthesis and cellular respiration Click on a lesson name to select.
Warm-Up 1. Define metabolism and name two important types of metabolism. Click on a lesson name to select.
Chapter 8 Cellular Energy Metabolism – all of the chemical reactions in a cell § Photosynthesis—light energy from the Sun is converted to chemical energy for use by the cell § Cellular respiration—organic molecules are broken down to release energy for use by the cell Click on a lesson name to select.
Prior- Knowledge 2. Which law of thermodynamics describes how energy is conserved (not created or destroyed)? Click on a lesson name to select.
Chapter 8 Cellular Energy Laws of Thermodynamics § First law—energy cannot be created nor destroyed. üDerived from the law of conservation of energy. § Second law—energy cannot be converted without the loss of usable energy. üExample: When consumers convert chemical energy into kinetic energy, some energy is loss as heat to the environment but NOT destroyed. Click on a lesson name to select.
Warm-Up 3. What is ATP and how is used to create energy? Click on a lesson name to select.
Chapter 8 Cellular Energy ATP: The Unit of Cellular Energy § ATP (Adenosine Triphosphate) ühas usable energy stored in the phosphate tail üreleases energy when the bond between the second and third phosphate groups is broken Click on a lesson name to select.
Chapter 8 Cellular Energy Photosynthesis § Photosynthesis = process by which producers use the energy of the sun to make food § Stores energy in chemical bonds - sunlight (radiant energy) is converted to chemical energy § Occurs in the chloroplasts Click on a lesson name to select.
Chapter 8 Cellular Energy Photosynthesis The Chemical Reaction § Carbon dioxide and water are the reactants § Glucose and oxygen are the products § Carbon Dioxide + Water Glucose + Oxygen Click on a lesson name to select.
Chapter 8 Cellular Energy Photosynthesis Two Phases of Photosynthesis § Light-Dependent Reactions § Light-Independent Reactions or Dark Reactions Click on a lesson name to select.
Chapter 8 Cellular Energy Photosynthesis Light Dependent Reactions § Chlorophyll is the green pigment in plants § What happens: - Cholorophyll absorbs light energy from the sun - Light energy energizes or excites electrons in chlorophyll - Enzymes transfer the energized (excited) electrons to ATP Click on a lesson name to select.
Chapter 8 Cellular Energy Photosynthesis Light Independent Reactions § These are also called the Dark Reactions § What happens: - ATP from the light-dependent reactions is used to convert water and carbon dioxide into glucose and oxygen Click on a lesson name to select.
Chapter 8 Cellular Energy Cellular Respiration § Cellular Respiration = process by which consumers obtain energy from the chemical bonds in food § Chemical bonds (found in organic molecules like sugar) are broken down to release energy (ATP) - Chemical energy is converted to kinetic energy and heat § Occurs in the mitochondria Click on a lesson name to select.
Chapter 8 Cellular Energy Cellular Respiration The Chemical Reaction § The reverse of photosynthesis § Glucose and oxygen are the reactants § Carbon Dioxide and Water are the products § Glucose + Oxygen Carbon Dioxide + Water + Energy Click on a lesson name to select.
Chapter 8 Cellular Energy Comparing Photosynthesis and Cellular Respiration Process Reactants Products Energy Involved Photosynthesis carbon dioxide, water glucose, oxygen input of radiant energy (sunlight) Cellular Respiration glucose, oxygen carbon dioxide, water release of chemical energy (ATP) Click on a lesson name to select.
Review Click on a lesson name to select.
Chapter 8 Cellular Energy Wrap-Up (Oct. 24) In which metabolic process are molecules broken down to produce carbon dioxide and water? A. photosynthesis B. cellular respiration C. homeostasis D. fermentation
Chapter 8 Cellular Energy Wrap-Up (Oct. 24) Where in the plant cell does photosynthesis take place? A. chloroplasts B. Golgi apparatus C. mitochondria D. vacuoles
Chapter 8 Cellular Energy Wrap-Up (Oct. 24) What is the overall purpose of cellular respiration? A. to make ATP B. to process H 2 O C. to store glucose D. to deliver oxygen
Chapter 8 Cellular Energy Wrap-Up (Oct. 24) Photosynthesis converts light energy to stored chemical energy. What form of chemical energy is used in cellular respiration? A. glucose B. oxygen C. chlorophyll D. carbon
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