Photosynthesis Portfolio Rubric

Question

Use this rubric as a guide in planning and conducting an investigation to show that leaves take in carbon dioxide and release oxygen during photosynthesis. You will describe the data that you will collect and explain why the data provide evidence to support your claim. In the end, you will reflect upon your investigation and think about how you could improve it. This rubric lists criteria for each section of the lab report.
Part 1:
Hypothesis and Background Information (4 points)
_____ Hypothesis statement can be tested according to the investigation plan. (2 points)
_____Presents detailed observations (background) and shows how they tie to the investigation. (2 points)
Teacher Comments:

Part 2:
Variables, Materials, Safety Concerns, and Procedure (4 points)
_____ Includes variables, materials, safety concerns, and procedure necessary to carry out the lab. (2 points)
_____ Procedures clearly illustrate how the hypothesis will be tested. (2 points)
Teacher Comments:

Data Collection and Analysis (8 points)
_____ Includes a complete summary of data/outcomes. (2 points)
_____ Includes tables, charts, and graphs, as necessary, to accurately present findings. (2 points)
_____Clearly explains the relationship(s) between data and hypotheses. (2 points)
_____Applies scientific terms consistently and accurately (2 points)
Teacher Comments:

Part 3:
Conclusion and Reflection (4 points)
_____Includes a complete summary of results from your experiment. (2 points)
_____Includes possible experimental errors and their potential impacts. Notes limitations. Ties back to research and/or background information, as needed. (2 points)
Teacher Comments:

Can you make me a full portfolio out of this and make it look like a early 9th grader rote it?

Answer 1

Photosynthesis Portfolio

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Part 1: Hypothesis and Background Information (4 points)

Hypothesis Statement:

I hypothesize that during photosynthesis, leaves take in carbon dioxide (CO2) from the air and release oxygen (O2) as a byproduct. Specifically, if we measure the oxygen levels in water plants over a period of time when exposed to light, we should see an increase in oxygen bubbles coming from the leaves, indicating that photosynthesis is occurring.

Background Information:

Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy stored in glucose. This process takes place mainly in the chloroplasts of plant cells. Plants absorb carbon dioxide from the atmosphere through small openings called stomata while taking up water through their roots. With the help of sunlight, they transform these raw materials into glucose and oxygen.

The equation for this process is:

6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂

This means that for every six molecules of carbon dioxide and six molecules of water used, one molecule of glucose and six molecules of oxygen are produced. This investigation aims to show how leaves interact with air and light to produce oxygen, providing evidence of the photosynthesis process.

Teacher Comments:

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Part 2: Variables, Materials, Safety Concerns, and Procedure (4 points)

Variables:

• Independent Variable: Amount of light exposure for the plant leaves.
• Dependent Variable: Amount of oxygen released by the leaves (measured by the number of bubbles produced in water).
• Controlled Variables: Type of plant used, water level, temperature, and size of the container.

Materials:

• A water plant (like Elodea)
• A clear container (such as a glass jar)
• Light source (lamp or sunlight)
• Measuring cup
• Stopwatch or timer
• Ruler (to ensure consistent plant length if necessary)

Safety Concerns:

• Handle the light source carefully to avoid burns.
• Ensure that electrical items (like a lamp) are used properly and do not come into contact with water.
• Keep the work area clean to prevent slips or spills.

Procedure:

1. Fill the clear container with water and submerge the water plant.
2. Place the container under a light source (or in sunlight) to provide illumination.
3. Observe the plant for a set period (e.g., 30 minutes) and start the timer.
4. Count the number of oxygen bubbles coming from the plant leaves during this time.
5. Repeat the experiment under different light conditions (e.g., dimmer light or in shade) to compare results.
6. Record the number of bubbles produced in each condition for data analysis.

Teacher Comments:

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Data Collection and Analysis (8 points)

Summary of Data/Outcomes:

During the investigation, I observed the number of oxygen bubbles produced by the plant over the set time intervals under different lighting conditions. In bright light, the plant produced an average of 50 bubbles every 10 minutes. In dim light, it produced only 15 bubbles in the same time period, and in the shade, it produced 5 bubbles.

| Condition | 10-Minute Bubble Count | |--------------------|------------------------| | Bright Light | 50 | | Dim Light | 15 | | Shade | 5 |

Visual Representation: (A simple bar graph can be drawn here showing the relationship between light conditions and bubble production.)

Relationship(s) Between Data and Hypotheses:

The data clearly supports the hypothesis that light affects the rate of photosynthesis. The more light present, the more oxygen bubbles were produced, indicating a higher rate of photosynthesis. In bright light, the plant produced 10 times more bubbles than in the shade, demonstrating that light is vital for the photosynthesis process.

Use of Scientific Terms:

I consistently used terms like "photosynthesis," "oxygen," "carbon dioxide," and "chloroplasts" throughout my investigation to accurately describe the process at hand.

Teacher Comments:

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Part 3: Conclusion and Reflection (4 points)

Summary of Results:

The experiment successfully demonstrated that leaves take in carbon dioxide and release oxygen during photosynthesis. The plant under bright light produced significantly more oxygen bubbles than those in dim light and shade, confirming my hypothesis about the role of light in this process.

Experimental Errors and Limitations:

Possible experimental errors could include not measuring the bubble count accurately or differences in the health of the plants used. The investigation was limited by the time frame and conditions set for observation, which might not represent longer-term photosynthesis outcomes.

To improve the investigation, using multiple plants of the same type and measuring their growth over several days could provide more robust data. Additionally, recording the temperature and using a controlled environment could help pinpoint factors that affect the rate of photosynthesis more accurately.

Teacher Comments:

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This portfolio outlines my investigation into photosynthesis, demonstrating how leaves take in carbon dioxide and release oxygen. I was able to observe clear evidence supporting my hypothesis, and I reflected on how future experiments could be improved for even more accurate results.

Answer 2

can you take out the extra "teachers comments" and the extra keys and turn the information you gave me in to normal paragraphs?

Answer 3

Photosynthesis Portfolio

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Part 1: Hypothesis and Background Information

I hypothesize that during photosynthesis, leaves take in carbon dioxide (CO2) from the air and release oxygen (O2) as a byproduct. Specifically, if we measure the oxygen levels in water plants over a period of time when exposed to light, we should see an increase in oxygen bubbles coming from the leaves, indicating that photosynthesis is occurring.

Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy stored in glucose. This process takes place mainly in the chloroplasts of plant cells. Plants absorb carbon dioxide from the atmosphere through small openings called stomata while taking up water through their roots. With the help of sunlight, they transform these raw materials into glucose and oxygen. The equation for this process is:

6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂

This means that for every six molecules of carbon dioxide and six molecules of water used, one molecule of glucose and six molecules of oxygen are produced. This investigation aims to show how leaves interact with air and light to produce oxygen, providing evidence of the photosynthesis process.

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Part 2: Variables, Materials, Safety Concerns, and Procedure

The variables in this investigation include an independent variable, the amount of light exposure for the plant leaves; a dependent variable, the amount of oxygen released by the leaves (measured by the number of bubbles produced in water); and controlled variables, such as the type of plant used, water level, temperature, and size of the container.

The materials needed for this investigation are a water plant (like Elodea), a clear container (such as a glass jar), a light source (lamp or sunlight), a measuring cup, a stopwatch or timer, and a ruler to ensure consistent plant length if necessary. Safety concerns include handling the light source carefully to avoid burns, ensuring that electrical items (like a lamp) are used properly and do not come into contact with water, and keeping the work area clean to prevent slips or spills.

The procedure for this investigation involves several steps. First, fill the clear container with water and submerge the water plant. Then, place the container under a light source (or in sunlight) to provide illumination. Next, observe the plant for a set period (e.g., 30 minutes) and start the timer. During this time, count the number of oxygen bubbles coming from the plant leaves. Repeat the experiment under different light conditions (e.g., dimmer light or in shade) to compare results and record the number of bubbles produced for data analysis.

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Data Collection and Analysis

During the investigation, I observed the number of oxygen bubbles produced by the plant over set time intervals under different lighting conditions. In bright light, the plant produced an average of 50 bubbles every 10 minutes. In dim light, it produced only 15 bubbles in the same time period, and in the shade, it produced five bubbles.

The data collected can be summarized in a simple table:

| Condition | 10-Minute Bubble Count | |-------------------|------------------------| | Bright Light | 50 | | Dim Light | 15 | | Shade | 5 |

This data clearly supports the hypothesis that light affects the rate of photosynthesis. The more light present, the more oxygen bubbles were produced, indicating a higher rate of photosynthesis. In bright light, the plant produced ten times more bubbles than it did in the shade, demonstrating that light is vital for the photosynthesis process. I consistently used scientific terms like "photosynthesis," "oxygen," "carbon dioxide," and "chloroplasts" throughout my investigation to accurately describe the process at hand.

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Part 3: Conclusion and Reflection

The experiment successfully demonstrated that leaves take in carbon dioxide and release oxygen during photosynthesis. The plant under bright light produced significantly more oxygen bubbles than those in dim light and shade, confirming my hypothesis about the role of light in this process.

Possible experimental errors could include inaccuracies in measuring the bubble count or differences in the health of the plants used. The investigation was limited by the time frame and conditions set for observation, which might not fully represent longer-term photosynthesis outcomes. To improve the investigation, I could use multiple plants of the same type and measure their growth over several days to provide more robust data. Additionally, recording the temperature and using a controlled environment could help pinpoint factors that affect the rate of photosynthesis more accurately.

This portfolio outlines my investigation of photosynthesis, demonstrating how leaves take in carbon dioxide and release oxygen. I observed clear evidence supporting my hypothesis and reflected on how future experiments could be improved for even more accurate results.