Cristina Saradeth - Photosynthesis Simulation A PDF

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Can't read my, can't read my
No, he can't read my poker face
(She's got me like nobody)
Can't read my, can't read my
No, he can't read my poker face
(She's got me like nobody)...

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Photosynthesis Simulation Name:

Cristina Saradeth

You will be examining photosynthesis in an aquatic plant using dissolved oxygen. Go to the cell energy simulation at Biology Simulations. I.

Background Plants perform both photosynthesis and cellular respiration. 1. How will photosynthesis affect oxygen levels? The oxygen levels will be affected by photosynthesis because plants have light capturing molecules that need the sunlight to be able to produce oxygen. oxygen is the main source for animals and other mammals to be able to survive and manouver in their daily life. 2. How will cellular respiration affect oxygen levels?

The oxygen levels can be affected by cellular respiration because plants and animals use glucose to make ATP energy which is also known as cellular respiration. II. Light Intensity Experimental Question: How does light intensity affect oxygen production? 1. Write your hypothesis. Hypothesis:

If the light intensity increases, then the oxygen production will be increased because of light intensity, plants need light energy to be photosynthesized and to produce oxygen

2. Set the fish number to 0 and the plant number to 5. Leave the other variables at the default values (25 degrees, white light). 3. Set the light intensity to 100%. 4. Record the starting and ending oxygen values. 5. Repeat steps 3 and 4 for 80%, 60%, 40%, and 20%. 6. Calculate and record the DO difference.

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Light Intensity (%)

DO Start

DO End

DO Difference

100

7.08 mg/L

9.13 mg/L

2.05 mg/L

80

7.04 mg/L

8.08 mg/L

1.04 mg/L

60

7.04 mg/L

7.05 mg/L

0.01 mg/L

40

7.09 mg/L

6.11 mg/L

-0.98 mg/L

20

7.01 mg/L

6.04 mg/L

-0.97 mg/L

7. Insert a graph (use Sheets or another spreadsheet program) displaying how light intensity affects changes in DO.

8. Write a sentence conclusion. The numbers on the chart slowly decreased and slowly the chart went down due to low temperature source and no organism to keep the plant alive and keep up with the maintenance of the plant. The plant in the water would have not survived or would have struggled to live inside of the water because the temperature of the water was not right for the plants to thrive in.

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9. Write a paragraph explaining your conclusion in terms of the process of photosynthesis.

In conclusion photosynthesis occurs in the presence of sunlight. The plant takes up carbon dioxide which was dissolved in the water, thereby increasing the pH in the absence of sunlight there was no photosynthesis occurring however the plant continued to respire, producing carbon dioxide.

III. Light Color Experimental Question: How does temperature affect oxygen production? 1. Write your hypothesis. Hypothesis:

If the temperature lowers the oxygen levels will drop and no organisms will be able to thrive

2. Set the fish number to 0 and the plant number to 5. Leave the other variables at the default values (100% light intensity, 25 degrees). 3. Set the light color to white (combination of all wavelengths/colors). 4. Record the starting and ending oxygen values. 5. Repeat steps 3 and 4 for violet, blue, green, yellow, orange, and red light. 6. Calculate and record the DO difference. Light Color

DO Start

DO End

White

7.09

9.13

Violet

7.06

7.57

Blue

7.06

7.60

Green

7.03

6.05

DO Difference

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Yellow Orange Red

7. Insert a graph (use Sheets or another spreadsheet program) displaying how light color affects changes in DO.

8. Write a sentence conclusion.

9. Write a paragraph explaining your conclusion in terms of the process of photosynthesis.

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IV. Temperature Experimental Question: How does temperature affect oxygen production? 1. Write your hypothesis. Hypothesis: 2. Set the fish number to 0 and the plant number to 5. Leave the other variables at the default values (100% light intensity, white light). 3. Set the temperature to 15 degrees. 4. Record the starting and ending oxygen values. 5. Repeat steps 3 and 4 for 20, 25, 30, and 35 degrees. 6. Calculate and record the DO difference. Temperature (C)

DO Start

DO End

DO Difference

15 20 25 30 35

7. Insert a graph (use Sheets or another spreadsheet program) displaying how temperature affects changes in DO.

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8. Write a sentence conclusion.

9. Write a paragraph explaining your conclusion in terms of the process of photosynthesis....