PHOTOSYNTHESIS PART I: FOOD FOR PLANTS UNIT II: CELL RESPIRATION & PHOTOSYNTHESIS KL BIOLOGY BUECHLER.

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Presentation transcript:

PHOTOSYNTHESIS PART I: FOOD FOR PLANTS UNIT II: CELL RESPIRATION & PHOTOSYNTHESIS KL BIOLOGY BUECHLER

WHAT’S FOOD FOR PLANTS? WHERE DO PLANT’S GET THE BUILDING BLOCKS FOR GROWTH? ARE SOIL AND WATER FOOD FOR PLANTS? INITIAL IDEAS: IT’S O.K. TO NOT BE CORRECT HERE!

SOIL COMPOSITION ORGANIC MATTER DEAD/DECAYING ORGANISMS MINERAL MATTER: NITROGEN PHOSPHORUS POTASSIUM CALCIUM MAGNESIUM SULFUR MANGANESE COPPER ZINC BORON CHLORINE MOLYBDEENUM So what’s “air” made of? Anything the plants might need from air?

SOIL COMPOSITION AIR NITROGEN OXYGEN CARBON DIOXIDE ARGON OTHER GASES DO AIR AND SOIL SHARE ANY INGREDIENTS? NITROGEN Why might plants need Nitrogen? (or do they?)

COMPARING LABELS YOU WERE ASKED TO ANALYZE THE FOLLOWING LABELS: ENERGY= CALORIES BUILDING BLOCKS FOR GROWTH= CARBS, PROTEINS AND LIPIDS MINERALS= ANYTHING FROM THE PREVIOUS LIST

COMPARING LABELS ItemEnergy (Calories?Carbs, Proteins, Lipids? Minerals? Bottled H2ONone SoilVery Little (organisms) Very Little (organism) Lots Multi-VitaminNone Lots Plant FertilizerNone Lots Human food (Cheeseburger) Lots Very little 2 THINGS PLANTS NEED TO GROW: WATER PLANT FOOD ARE THESE ITEMS “FOOD” BY SCIENTIFIC DEFINITION? FOOD= SOMETHING THAT PROVIDES ENERGY AND BUILDING BLOCKS FOR GROWTH BE SURE Q6 IS ANSWERED

COMPARING LABELS ItemEnergy (Calories?Carbs, Proteins, Lipids? Minerals? Bottled H2ONone SoilVery Little (organisms) Very Little (organism) Lots Multi-VitaminNone Lots Plant FertilizerNone Lots Human food (Cheeseburger) Lots Very little SO IS PLANT FOOD MORE LIKE HUMAN FOOD OR MORE LIKE A MINERAL SUPPLEMENT? ANSWER Q7 IN A COMPLETE SENTENCE IF YOU HAVEN’T

HUMAN FOOD OR MINERAL SUPPLEMENT? Soil Human FoodMulti-Vitamins Little bit of “organic matter”  protein, carbs and lipid Lots Of Minerals H2O FOR Q8: WHAT’S THE EVIDENCE FOR PLANT FOOD BEING MORE LIKE A MINERAL SUPPLEMENT THAN HUMAN FOOD?

VAN HELMONT’S EXPERIMENT TreeSoil Initial Weight 5200 Final Weight Change in Weight IS SOIL FOOD FOR PLANTS? HOW DO YOU KNOW? IS MINERAL CONTENT OF SOIL ENOUGH TO EXPLAIN THE DIFFERENCE? Q10, 11, 12 AND 13

WHERE DO PLANTS GAIN MASS FROM? WHERE DOES THE CARBON COME FROM?

SOURCES OF C, H & O SO CO2 IS ONE SOURCE OF CARBON THAT ALLOWS A PLANT TO BUILD MASS GLUCOSE IS THE OTHER NEEDED TO MAKE STARCH OR CELLULOSE PLANT CELL WALLS ARE MADE FROM CELLULOSE

REVIEW: RESPIRATION CHEMICAL FORMULA Q 18 Q19:Carbon, Hydrogen and Oxygen are needed to build glucose

PRIESTLY’ S EXPERIMENT