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Unit 5 part 1 photosynthesis.jan.2013.delta
- 1. * Your Life Depends on It!!!
- 2. * What do living organisms do with their energy? (Create a verbal list with your table partner.)
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- 4. * Energy isthe ability to do work; work is a force on something exerted over a certain distance. So energy is often expressed as forces moving from place to place which cause CHANGES which can sometimes be noticed or measured.
- 5. * Energy isneither created or destroyed it simply changes from one form to another.
- 6. * Wind to electricity Chemical to mechanical Food to mechanical Solar to food Nuclear to heat Others? Yes lots!
- 7. * SUN
- 8. * What is aproducer? An example? What is a consumer? An example?
- 9. * PHOTOSYNTHESIS
- 10. * YOU DEFINE IT: Photo means ___________. Synthesis means _______________.
- 11. * A quickword about these molecules. ATP is the fundamental ENERGY molecule for almost all cell functions. When your cell needs to do ANYTHING requiring energy (or cell work) it will ‘burn’ ATP molecules. * Heres what they look like------- *
- 12. adenosine triphosphate tri=3 * adenosine diphosphate di=2
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- 14. * When thelast “P” is broken off, energy is transfered which allow your cells to: * > make molecules * > transport molecules * > send chemical signals * > reproduce * ATP is to your cells as is to your house. *
- 15. * When thelast “P” is broken off, energy is released which allow your cells to: * > make molecules * > transport molecules * > send chemical signals * > reproduce * ATP is to your cells as electricity is to your house. *
- 16. * * Right NOW,I mean RIGHT NOW, your body is using TRILLIONS of molecules of ATP for all your energy needs!!! * Crazy, eh?Take a moment and give ‘em a pat on the proverbial head ATPs
- 17. * You willnotice ATP appearing often in this energy unit in both photosynthesis and respiration. * Keep in mind what it is used for; sometimes it is USED for the cell to do things: ATP ADP * Other times it is stored: ADP ATP *
- 18. Okay, back toPhotosynthesis: What requirements do autotrophs have in order to feed themselves? You and your table partner come up with the 3 main needs! HOPEFULLY YOU SAID…. WATER Carbon Dioxide SUNLIGHT
- 19. And what kindof food do they makes? Eggs, waffles, steak? JUST KIDDING! Think of the BIG 4. Which macromolecule might they produce? DID YOU GUESS RIGHT… CARBOHYDRATES! Specifically sugar in the form of glucose. *
- 20. SUGAR, OH HONEYHONEY Sugar is the molecule that starts the food chain, for it is sugar that provides chemical energy to the plants and to the organism that eat the plants (heterotrophs) either directly or indirectly. Sugar is used by plants for chemical energy and as a structural molecule………
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- 23. SUGAR *
- 24. * 2 2 3 6 3 2
- 26. * Roots are not exposed to sunlight, therefore there is no use for chloroplasts to be present in roots.
- 27. * GIVEN: •Elodea plant isan aquatic plant •Just like all plants it does photosynthesis •Bromothymol blue is an indicator for Carbon Dioxide gas How can we test the Elodea to determine if photosynthesis is taking place? LET’S DO AN EXPERIMENT!
- 28. * LIGHT DEPENDENT REACTION LIGHT INDEPENDENT REACTION
- 29. * Dependent *Light energy is captured by the pigment “chlorophyll” and used to split water. *When the water is “split” oxygen is given off as a waste product, and the energy from the light is transferred in to the hydrogen electrons to make two types of cellular energy know as ATP and NADPH. *ATP and NADPH are energy molecules that are used to drive the second reaction.
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- 31. *Light energy isabsorbed by the chlorophyll and it is used to split water *O2 oxygen is released (as a waste product) *The energy from the sun is then transferred into an ATP molecule by using an excited H atom. *
- 32. *OK fine, soWHERE’S THE SUGAR??!! .. It appears in the next step, Oh curious one * Dependent
- 33. *Energy originally fromthe light reaction in the form of cell energy molecules ATP and NADPH combine with carbon dioxide from the air to make the 3-carbon sugar (C3H6O3.) • BasicallyH + CO2 (with energy) = C3H6O3. * Independent
- 34. * There area series of complex chemical reactions that accomplish this process; taken together they are known as the Calvin Cycle named after the scientist that discovered these steps. * The resulting 3-carbon sugar produced in the Calvin Cycle is then used by the plant to make other organic compounds such as the monosaccharide (glucose) or the polysaccharide (starch.) * As before, find all these molecules in the next picture * Independent
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- 41. * What dothe building materials represent in the photosynthesis equation? * What do the generators represent? * What do the carpenters represent? * What do the finished homes represent? *
- 42. * Look for– * Starting and ending molecules * Interactions with atmosphere * MAJOR product?? * carbohydrates * By product?? * oxygen *
- 44. * WORKON THE PHOTOSYNTHESIS BREAKDOWN SHEET. REFER TO THE DETAILED EXPLANATIONS IF YOU DO NOT KNOW THE ANSWERS. KEEP THIS IN MIND- WHERE DOES EACH PART OF THE PHOTOSYNTHESIS EQUATION COME FROM? From the light independent reaction and the From atmosphere (organisms) From the Sun atmosphere Carbon dioxide + Water + Light Energy Oxygen + Sugar Given off in the light dependent reaction From rain or aquifer
- 45. * WHATDO YOU THINK MIGHT AFFECT THE RATE/SPEED AT WHICH PHOTOSYNTHESIS WILL OCCUR? HOW CAN WE TEST IT? LET’S DO AN EXPERIMENT!
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- 47. SO WHAT ISNEXT? After photosynthesis has produced sugar and released oxygen…the plants cells use the sugar and oxygen in a process called CELLULAR RESPIRATION ________________________ which then provides energy for the entire cell! What cycle is this ? (You just saw it recently!!)
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