Go to Section: Saving for a Rainy Day Suppose you earned extra money by having a part-time job. At first, you might be tempted to spend all of the money, but then you decide to open a bank account. 1. What are the benefits of having a bank account? 2. What do you have to do if you need some of this money? 3. What might your body do when it has more energy than it needs to carry out its activities? 4. What does your body do when it needs energy? Section 8-1 Interest Grabber

Go to Section: 8–1 Energy and Life A.Autotrophs and Heterotrophs B.Chemical Energy and ATP 1.Storing Energy 2.Releasing Energy C.Using Biochemical Energy Section 8-1 Section Outline

Go to Section: AdenineRibose3 Phosphate groups Section 8-1 ATP

Go to Section: ADPATP Energy Adenosine diphosphate (ADP) + PhosphateAdenosine triphosphate (ATP) Partially charged battery Fully charged battery Section 8-1 Figure 8-3 Comparison of ADP and ATP to a Battery

Go to Section: ADPATP Energy Adenosine diphosphate (ADP) + PhosphateAdenosine triphosphate (ATP) Partially charged battery Fully charged battery Section 8-1 Figure 8-3 Comparison of ADP and ATP to a Battery

Go to Section: Trapping Energy Have you ever used a solar-powered calculator? No matter where you go, as long as you have a light source, the calculator works. You never have to put batteries in it. Section 8-2 Interest Grabber

Go to Section: 1. A solar-powered calculator uses solar cells that are found in rows along the top of the calculator. Into what kind of energy is the light energy converted so that the calculator works? 2.Recall that plants use light energy from the sun to make food. Into what kind of energy is the light energy converted by plants? 3.Most plants, no matter what size or shape they are, have some parts that are green. Which parts of a plant are usually green? 4.What does the green color have to do with the plant’s ability to convert light energy into the energy found in the food it makes? Section 8-2 Interest Grabber continued

Go to Section: 8–2Photosynthesis: An Overview A.Investigating Photosynthesis 1.Van Helmont’s Experiment 2.Priestley’s Experiment 3.Jan Ingenhousz B.The Photosynthesis Equation C.Light and Pigments Section 8-2 Section Outline

Go to Section: Light Energy Chloroplast CO 2 + H 2 OSugars + O 2 Section 8-2 Photosynthesis: Reactants and Products

Go to Section: Absorption of Light by Chlorophyll a and Chlorophyll b VBGYOR Chlorophyll b Chlorophyll a Section 8-2 Figure 8-5 Chlorophyll Light Absorption

Go to Section: A Look Into the Future It is 100 years in the future and you are a research scientist. An enormous volcanic eruption has recently sent huge quantities of dust and ash into the atmosphere. Working with a partner, make a list of how this event will affect each of the following: 1. photosynthesis 2. plant life 3. animal life 4. human societies Section 8-3 Interest Grabber

Go to Section: 8–3The Reactions of Photosynthesis A.Inside a Chloroplast B.Electron Carriers C.Light-Dependent Reactions D.The Calvin Cycle E.Factors Affecting Photosynthesis Section 8-3 Section Outline

Go to Section: Photosynthesis includes of take place in takes place in uses to produce use Light- dependent reactions Calvin cycle Thylakoid membranes StromaNADPH ATP Energy from sunlight ATPNADPHO2O2 Chloroplasts High-energy sugars Section 8-3 Concept Map

Go to Section: Chloroplast Light O2O2 Sugars CO 2 Light- Dependent Reactions Calvin Cycle NADPH ATP ADP + P NADP + Chloroplast Section 8-3 Figure 8-7 Photosynthesis: An Overview

Go to Section: Hydrogen Ion Movement Photosystem II Inner Thylakoid Space Thylakoid Membrane Stroma ATP synthase Electron Transport Chain Photosystem IATP Formation Chloroplast Section 8-3 Figure 8-10 Light-Dependent Reactions

Go to Section: ChloropIast CO 2 Enters the Cycle Energy Input 5-Carbon Molecules Regenerated Sugars and other compounds 6-Carbon Sugar Produced Section 8-3 Figure 8-11 Calvin Cycle

Video Contents Videos Click a hyperlink to choose a video. ATP Formation Photosynthesis Light-Dependent Reactions, Part 1 Light-Dependent Reactions, Part 2 Calvin Cycle

Video 1 Click the image to play the video segment. Video 1 ATP Formation

Video 2 Click the image to play the video segment. Video 2 Photosynthesis

Video 3 Click the image to play the video segment. Video 3 Light-Dependent Reactions, Part 1

Video 4 Click the image to play the video segment. Video 4 Light-Dependent Reactions, Part 2

Video 5 Click the image to play the video segment. Video 5 Calvin Cycle

Internet ATP activity Interactive test For links on Calvin cycle, go to and enter the Web Code as follows: cbn For links on photosynthesis, go to and enter the Web Code as follows: cbn Go Online

Section 1 Answers Interest Grabber Answers 1. What are the benefits of having a bank account? To save money and earn interest. 2. What do you have to do if you need some of this money? Go to the bank and take out the money you need. 3. What might your body do when it has more energy than it needs to carry out its activities? Students will likely say that the body stores the energy. 4. What does your body do when it needs energy? Student answers may include that energy is gotten from food.

Section 2 Answers Interest Grabber Answers 1. A solar-powered calculator uses solar cells that are found in rows along the top of the calculator. Into what kind of energy is the light energy converted so that the calculator works? They convert light energy into electrical energy. 2.Recall that plants use light energy from the sun to make food. Into what kind of energy is the light energy converted by plants? Plants convert light energy into chemical energy. 3.Most plants, no matter what size or shape they are, have some parts that are green. Which parts of a plant are usually green? Leaves are green, as are some stems. 4.What does the green color have to do with the plant’s ability to convert light energy into the energy found in the food it makes? The green color is the pigment chlorophyll, which absorbs light energy from the sun and converts it to chemical energy in the process of photosynthesis.

Section 3 Answers Interest Grabber Answers Working with a partner, make a list of how this event will affect each of the following: 1. photosynthesisThe rate of photosynthesis will decrease due to reduced sunlight. 2. plant lifePlants will grow more slowly or die off due to decreased rate of photosynthesis. 3. animal lifeAnimal populations will decrease after a while due to fewer plants for herbivores to eat. Fewer herbivores will eventually result in fewer carnivores. Also, less oxygen will be available. 4. human societiesHuman societies will have to adjust their eating habits as some food species die out.

End of Custom Shows This slide is intentionally blank.