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Block Day- 12/7 • Homework: Study for Checkup on Friday • Checkup will include: Inputs and outputs of photosynthesis Why is soil NOT food? What is essential for plants? • Food for Plants Test Next Week=Block Day • MAKE A NEW ENTRYPHOTOSYNTHESIS DETAILS-12/7 WE KNOW PLANTS NEED LIGHT, CO2, AND WATER TO PERFORM PHOTOSYNTHESIS. • WHY CAN’T WE STAND IN THE SUN/LIGHT AND DRINK WATER AND INHALE CO2 AND MAKE SUGAR LIKE PLANTS DO? • VIDEO CLIP 1– PHOTOSYNTHESIS • VIDEO CLIP 2– CHLOROPLASTS AND PHOTOSYNTHESIS Place where photosynthesis takes place • WHY DO PLANTS PERFORM PHOTOSYNTHESIS? • WHAT IS THE ROLE OF THE SUN IN PHOTOSYNTHESIS? • WHAT WOULD HAPPEN TO AMOUNT OF GLUCOSE/STARCH IN A PLANT IF WE BLOCKED THE AIR (CO2) FROM ENTERING A LEAF? BOTH PLANTS STILL HAVE ACCESS TO LIGHT AND WATER— BUT THE PLANT ON THE RIGHT HAS VASELINE ON THE LEAVES TO BLOCK AIR • DRAW THE SET UP OF THE PLANT—SHOWING HOW WE CAN REDUCE THE AMOUNT OF CO2 ENTERING THE LEAF Hypothesis Glucose and starch in the leaves are built using a form of carbon taken in from the environment. Glucose and starch in the leaves are NOT built using a form of carbon taken in from the environment. Prediction LIMITED CO2 LEAF: LESS/NO STARCH CONTROL LEAF: WILL HAVE STARCH LIMITED CO2 LEAF: BOTH WILL HAVE/NOT HAVE CONTROL LEAF: STARCH BOTH PLANTS STILL HAVE ACCESS TO LIGHT AND WATER—BUT THE PLANT ON THE RIGHT HAS VASELINE ON THE LEAVES TO BLOCK AIR Control leaf (open to atmosphere) Limited CO2 leaf (covered with Vaseline) Results: Starch indicator with CO2 – limited and control radish plants LEAF INITIAL COLOR LIMTED-CO2 YELLOW/PALE GREEN CONTROL (normal atmosphere) DARK GREEN COLOR AFTER INDICATOR LIGHT/IODINE COLOR BLACK Based on our experiments and what we have learned, show the inputs and outputs of PHOTOSYNTHESIS LIGHT CO2 H 20 GLUCOSE CHEMICAL 02 • Open to ENTRYBUILDING BLOCKS FOR PLANTS • GET A PACKET (1 PER TABLE) • POTATOES CONTAIN STARCH AND GROW UNDERGROUND. • ONLY THE ABOVE GROUND PARTS HAVE GREEN LEAVES. • SOIL AND WATER AREN’T FOOD. • SO, WHERE DO YOU THINK THE STARCH IN THE POTATO COMES FROM? LEAF POTATO (tuber) Time 0 STEM (vascular tissue) ROOT LEAF POTATO (tuber) Time 1 STEM (vascular tissue) ROOT Time Interval Time 0 - Time 1 Time 1 - Time 2 Time 2 - Time 3 Time 3 - Time 4 Time 4 - Time 5 Observations Time Interval Observations GLUCOSE IS PRODUCED IN Time 0 - Time 1 THE LEAVES Time 1 - Time 2 Time 2 - Time 3 Time 3 - Time 4 Time 4 - Time 5 LEAF POTATO (tuber) Time 2 STEM (vascular tissue) ROOT Time Interval Observations GLUCOSE IS PRODUCED IN Time 0 - Time 1 THE LEAVES Time 1 - Time 2 Time 2 - Time 3 Time 3 - Time 4 Time 4 - Time 5 SOME OF THE GLUCOSE ASSEMBLES INTO SUCROSE AND STARCH. SOME SUCROSE MOVES FROM THE LEAVES TO THE STEM LEAF POTATO (tuber) Time 3 STEM (vascular tissue) ROOT Time Interval Observations GLUCOSE IS PRODUCED IN Time 0 - Time 1 THE LEAVES Time 1 - Time 2 SOME OF THE GLUCOSE ASSEMBLES INTO SUCROSE AND STARCH. SOME SUCROSE MOVES FROM THE LEAVES TO THE STEM Time 2 - Time 3 MORE GLUCOSE ,SUCROSE, AND STARCH. MORE SUCROSE MOVES FROM THE LEAVES TO THE STEMAND SOME GOES TO THE ROOT AND POTATO Time 3 - Time 4 Time 4 - Time 5 LEAF POTATO (tuber) Time 4 STEM (vascular tissue) ROOT Time Interval Observations GLUCOSE IS PRODUCED IN Time 0 - Time 1 THE LEAVES Time 1 - Time 2 SOME OF THE GLUCOSE ASSEMBLES INTO SUCROSE AND STARCH. SOME SUCROSE MOVES FROM THE LEAVES TO THE STEM Time 2 - Time 3 MORE GLUCOSE ,SUCROSE, AND STARCH. MORE SUCROSE MOVES FROM THE LEAVES TO THE STEMAND SOME GOES TO THE ROOT AND POTATO Time 3 - Time 4 STARCH IS BEING ASSEMBLED IN THE POTATO Time 4 - Time 5 LEAF POTATO (tuber) Time 5 STEM (vascular tissue) ROOT Time Interval Observations GLUCOSE IS PRODUCED IN Time 0 - Time 1 THE LEAVES Time 1 - Time 2 SOME OF THE GLUCOSE ASSEMBLES INTO SUCROSE AND STARCH. SOME SUCROSE MOVES FROM THE LEAVES TO THE STEM Time 2 - Time 3 MORE GLUCOSE ,SUCROSE, AND STARCH. MORE SUCROSE MOVES FROM THE LEAVES TO THE STEMAND SOME GOES TO THE ROOT AND POTATO Time 3 - Time 4 STARCH IS BEING ASSEMBLED IN THE POTATO Time 4 - Time 5 MORE STARCH IS BEING ASSEMBLED IN THE POTATO AND 1 GLUCOSE IS GONE IN THE ROOT • POTATOES CONTAIN STARCH AND GROW UNDERGROUND. • ONLY THE ABOVE GROUND PARTS HAVE GREEN LEAVES. • SOIL AND WATER AREN’T FOOD. • SO, WHERE DO YOU THINK THE STARCH IN THE POTATO COMES FROM? • SUMMARY QUESTIONS 1. WHERE DID THE GLUCOSE COME FROM IN TIME 1? GLUCOSE WAS MADE FROM CO2 IN THE AIR AND WATER FROM THE ROOTS 2. WHAT FUNCTION DOES IT APPEAR THE STEM PLAYS? THE STEM IS FOR TRANSPORT 3. WHAT FORM OF CARB TRAVELS THROUGH THE STEM? SUCROSE TRAVELS THROUGH THE STEM 4. WHERE DOES MOST OF THE ASSEMBLY INTO STARCH TAKE PLACE? MOST OF THE STARCH IS ASSEMBLED IN THE POTATO. A LITTLE BIT IS ASSEMBLED IN THE LEAVES 5. WHY DO YOU THINK THE PLANT LINKS MANY GLUCOSE MOLECULES TOGETHER IN THE TUBER? STARCH STORAGE. CAN BE BROKEN APART TO USE AS FOOD FOR THE NEXT YEAR’S PLANT 6. WHERE DOES THE GLUCOSE AND STARCH THAT ARE FOUND IN THE ROOT AND POTATO COME FROM? (WHERE DID IT START) THE GLUCOSE CAME FROM THE LEAVES WHERE IT WAS MADE BY PHOTOSYNTHESIS 7. WHAT HAPPENS TO THE MISSING GLUCOSE IN TIME 5? WHY? THE GLUCOSE WAS USED FOR ENERGY. ROOTS GROW THROUGH THE SOIL—THIS TAKES ENERGY 8) WHAT PROCESS USES GLUCOSE OR OTHER FOOD MOLECULES TO PROVIDE ENERGY FOR MOVEMENT? CELLULAR RESPIRATION BREAKS THE BONDS OF GLUCOSE TO RELEASE CHEMICAL ENERGY 9) IF PLANTS PERFORM CELLULAR RESPIRATION LIKE ANIMALS DO, WHAT MOLECULE(S) SHOULD WE BE ABLE TO MEASURE AS EVIDENCE? OXYGEN AND CO2. OXYGEN IS AN INPUT AND CO2 IS AN OUTPUT. • WHY WOULD A PLANT NEED TO USE GLUCOSE? FOR THE SAME REASON WE DO—ENERGY FOR MOVEMENT/GROWTH • WHAT PROCESS BREAKS APART FOOD MOLECULES TO RELEASE ENERGY? CELLULAR RESPIRATION BREAKS THE BONDS OF GLUCOSE TO RELEASE CHEMICAL ENERGY • IF PLANTS PERFORM CELLULAR RESPIRATION LIKE ANIMALS DO, WHAT MOLECULES SHOULD WE BE ABLE TO MEASURE AS EVIDENCE? OXYGEN AND CO2. OXYGEN IS AN INPUT AND CO2 IS AN OUTPUT. • Make a new entryDO PLANTS PERFORM CELLULAR RESPIRATION? • GET A PREDICTION CHART FROM THE FRONT COUNTER BtB is an indicator for CO2 BLUE BtB= LOW CO2 YELLOW BtB= HIGH CO2 • WE KNOW THAT IN THE LIGHT PLANTS WILL DECREASE THE AMOUNT OF CO2—THEY USE THE C AND O ATOMS TO MAKE GLUCOSE • BUT, WE ALSO KNOW THAT PLANTS NEED TO USE THE FOOD THEY MAKE FOR ENERGY AND CELLULAR RESPIRATION IS THE PROCESS TO GET THE ENERGY FROM THE FOOD HOW CAN WE KEEP THE PLANTS FROM DOING PHOTOSYNTHESIS AND STILL SEE IF THE PRODUCE CO2 (PERFORM Cellular Respiration)? • Part 1: Initial Explanation and Predictions • We will look for color change in the BTB indicator. BTB is normally blue. If BTB changes to yellow that means more CO2 is in the container. If it changes from yellow to blue, there is less CO2 The amount of CO2 will… High CO2 increase be the same decrease Low CO2 increase be the same decrease What will happen to the color? stay yellow turn blue stay blue turn yellow What do you predict will happen to the amount of CO2 in each chamber? Explain your prediction for the plant with HIGH CO2. Explain your prediction for the plant with LOW CO2 CONDITIONS: DAY 1 HIGH CO2 LOW CO2 NO LIGHT • RESULTS: High CO2 Low CO2 The amount of CO2 … increased was the same decreased increased was the same decrease What happened to the color? stayed yellow stayed blue turned yellow turned blue