Photosynthesis Post lab Questions-3 PDF

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Photosynthesis Post-lab (36 points) Name __lauryn frazier ____________________________ Date________7/14/2020_____ Please provide a response to the following questions. Your responses should be typed, graphs and tables should not be hand drawn. Please submit on canvas 1. Why is photosynthesis important to living organism? Explain (2 points) - Photosynthesis is important to living organisms because photosynthesis make food from sunlight, carbon dioxide and even water which photosynthesis main source is oxygen. 2. What is the guiding question for this lab? How does the guiding question relate to the photosynthesis? Explain how can light (intensity and quality) affects the rate of photosynthesis? (4 points) - The guiding question is does the distance of the light affect the rate of photosynthesis? This question relates to photosynthesis because the amount of distance a plant is away from light can affect the rate of photosynthesis at which it may happen. 3. Which were the Dependent and Independent variables for this lab? (4 points) Dependent: amount of leaf disk that float Independent: Light source 4. What was the control(s) in this experiment? Why were those control used? (2 points), - The control was the beaker containing baking soda, they were used to provide the right chemicals for leaves to test this question. 5. A. What is the answer to your research question (i.e., did the distance of light affects the rate of photosynthesis)? (2 points) - Yes light does affect rate of photosynthesis. Light gives the plant energy for photosynthesis to occur. With less light the intensity of the plant doesn’t retain as much energy B. Insert your table of results here (5 points) NaHCO3 0

1

Gr oup1 Gr oup2 Gr oup3 Gr oup4 Gr oup5 Gr oup6 Gr oup7 Gr oup8 Gr oup9 Gr oup10 Gr oup11 Gr oup120: 00

5: 03

8

10

15

16

20

25

30

35

36

40

50 8: 50

3: 50

12: 33 9: 20

4: 10 7: 43 4: 00

10: 45 12: 50 3: 50

12: 33

4: 37

3: 19 10: 30

12: 10

10

10 16: 30

12 12

20: 30 14

C. Justify your response to the guiding question by using relevant data from your table (3 points) -

In group 3 with the distance of 10cm between the leaf discs and light it only took 4 minutes 10 seconds for half on the leaf discs to rise. When the distance between the light and leaf discs was farther at 40cm it took 9 minutes 20 seconds. In group 4 with the distance of 10 cm between the leaf discs and light it only took 7 minutes 43 seconds for half on the leaf discs was farther at 38cm it took 10 minutes 45 seconds. With the evidence i know that the distance between the light source and the leaf discs affects the time for them to rise. Photosynthesis occurs slower with less light intensity.

6. What were some potential errors encountered during this experiment? How could you have corrected those errors? At least two errors should be discussed (6 points) 1having two different vacuuming out the gas which lead to more air being pulled out of one than the other, next time we can just have the same person do it 2-placement of the beakers behind the light were not equally distant, next time have them distant at the same measure. 7. How did you know photosynthesis was occurring in the leaf in this experiment? (2 points) - Leaves were floating 8. What was the role of Sodium bicarbonate (Baking soda) in this experiment? (2 points) - Serves as carbon sources for photosynthesis, and bicarbonate is necessary for the disks to undergo photosynthesis 9. Based on the information provided in canvas, what environmental variables/factors that might affect the rate of photosynthesis? Why do you think they would affect it? Discuss at least 2. (4 points) -The environmental factors that might affect the rate of photosynthesis thesis is light intensity, carbon dioxide concentration, the amount of chlorophyll and temperature. It’s affecting because without light plants photosynthesis cannot occur quickly, and chemical reaction that combine carbon dioxide and water to produce glucose and they are controlled by enzymes , for another the photosynthesis is affected by the temperature and chlorophyll absorbs the light that concert carbon dioxide to water to glucose...