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There could be evidence of an error because out of our three groups only one group did not float. In this experiment we could have encountered error when we were taking the gas out of the leaves earlier in the lab. At this point in time we could have taken too much carbon dioxide and did not leave enough for the one group of CHADS to begin photosynthesis again.

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Our hypothesis is that the CHAD will take 7 minutes to begin floating when following the instructions of the lab.
In the lab we discovered that the Chad began to float at 8 minutes instead. This change could have came from a user error or it is the average time for photosynthesis to begin again within the leaves.

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The y-axis is time and the x-axis is the number of floating CHAD

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Materials:

One hole puncher, 3 plant leafs, soap detergent, windex, one 300ml beaker, three 100ml beakers.

1. Punch out 30 leaf dots making sure to not use the root of the leaf.

2. Place ten leaf pieces in each syringe.

3. Create a solution of sodium bicarbonate with soap, water, one drop of windex in the 300ml beaker and add it to the three syringes.

4. Remove oxygen from the syringes and create a vacuum within the syringe by using your finger to cover the syringe and then pull the plunger. Repeat this process until all leafs fall to the bottom of the syringe.

5. After this place each set of leafs into their own solution of sodium bicarbonate in an 100ml beaker and place under light.

6. Record how many leafs begin floating during one minute intervals.

7. Compare your results to the control group.

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Adding ammonia (windex) to our sodium bicarbonate solution showed that the rate of photosynthesis for the spinach leaves increased. Compared to the control group, the disks started floating faster than theirs, but in the end we had less disks float to the top. After 2 minutes, we had spinach disks start floating, while the control group’s spinach disks didn’t start floating until after 6 minutes.

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While performing our experiment some of our potential errors could have been not keeping the temperature the same. The warm and cold water could have become room temperature overtime which would effect the number of floating leaves, because the temperatures become more optimal over time.

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Materials

● Soap (3 drops from pipette total)

● Baking Soda (3 Pinches total)

● Water

● Leaf ( 30 )

● Syringe

● Hole Puncher

● Lamp

● Timer

● Stirring Rod

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The control group will have the most photosynthetic activity compared to the hot and cold water because it will have an optimal temperature.

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I’m conclusion, at lower temperatures ( cold water ) the enzyme doesn’t have enough energy to meet many substrate molecules, so the reaction was slowed. On the other hand, when the temperature was greater ( warm water ) the particles in the reaction moved quicker and were able to collide more, therefore the rate of photosynthesis also rised

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Our experiment brought up the question of whether adding nitrogen in the form of ammonia within Windex would speed up the rate of photosynthesis within our floating chads. The hypothesis we settled on was that yes the nitrogen will increase the rate of photosynthesis due to the fact that nitrogen is present in fertilizers meant to speed up growth.

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What will happen to the rate of photosynthesis in leaves if they are placed in a solution of sodium bicarbonate with four grams of baking soda? If the leaves are placed in a solution of sodium bicarbonate with four grams of baking soda, then the rate of photosynthesis will increase and the leaves will float faster.