Photosynthesis Lab Flashcards

Questions and Answers

What gas do we need to breathe in to survive?

Oxygen

Where is oxygen produced?

The gas is produced from plant life

How does light intensity affect oxygen production?

When the light intensity is increased, the oxygen production also is increased.

How does temperature affect oxygen production?

A temperature that is too high or too low negatively affects oxygen production. Signup and view all the answers

How does CO2 level affect oxygen production?

When there is no CO2, no oxygen can be produced. Signup and view all the answers

How does oxygen production relate to the rate of photosynthesis?

When a plant is doing photosynthesis, it releases oxygen. Signup and view all the answers

What light intensity and CO2 level do you think will maximize the rate of photosynthesis?

A medium light intensity and a CO2 level around 100-200. Signup and view all the answers

The ideal temperature for oxygen production is ___.

24.0 degrees Celsius Signup and view all the answers

The ideal light intensity for oxygen production is ___.

45 percent Signup and view all the answers

The ideal CO2 level for oxygen production is ___.

450 ppm Signup and view all the answers

The oxygen production rate is ___.

24.3 mL/h Signup and view all the answers

Why would it be hard to find the ideal light intensity if the temperature were very hot or cold?

It would be hard to find the ideal light intensity as the level of light affects the temperature. Signup and view all the answers

Why would it be hard to find the ideal CO2 level if the light intensity were very low?

It would be hard to find the ideal CO2 level if the light intensity were very low because there would be less CO2 in that environment. Signup and view all the answers

How does the color of light affect the rate of photosynthesis?

Some colors allow for higher levels of photosynthesis compared to others. Signup and view all the answers

Which color of light do you think will maximize the rate of photosynthesis?

I think green will allow for the maximum rate of photosynthesis because it's the same color as the chloroplast and plant. Signup and view all the answers

Which colors were absorbed best by the plant?

450 nm and 650 nm Signup and view all the answers

Which colors were absorbed worst?

550 nm, 700 nm, and 400 nm Signup and view all the answers

How does the reflection of light explain the relatively low flow of oxygen in green light?

The colors of the leaf reflecting off the leaf are not green. Signup and view all the answers

Were you able to increase oxygen production by moving the temperature slider?

No Signup and view all the answers

Were you able to increase oxygen production by moving the light intensity slider?

Nope! Signup and view all the answers

Were you able to increase oxygen production by moving the CO2 level slider?

Yep Signup and view all the answers

What was the limiting factor in this situation?

The CO2 level Signup and view all the answers

How do you know what the limiting factor was?

Because if it were raised, the oxygen flow would also have increased. Signup and view all the answers

Why is it important for a farmer to know what the limiting factor is in a greenhouse?

So you can change the limiting factor in a way that will benefit the plant's photosynthesis. Signup and view all the answers

Study Notes

Photosynthesis Key Concepts

Oxygen Requirement: Essential gas needed for human respiration, produced by photosynthetic plants.
Oxygen Production: Generated through plant processes, particularly during photosynthesis.
Impact of Light Intensity: Increasing light intensity elevates oxygen production; optimal levels peak at mid-range intensity.
Effect of Temperature: Oxygen production is hindered by extreme temperatures, affecting photosynthetic efficiency.
CO2 Influence: Insufficient carbon dioxide (CO2) levels halt oxygen production, emphasizing its necessity in photosynthesis.
Photosynthesis and Oxygen Link: Oxygen is a byproduct of photosynthesis, indicating the process's success.

Optimizing Photosynthesis

Ideal Conditions Prediction: Suggested optimal conditions for photosynthesis include medium light intensity and CO2 levels around 100-200 ppm.
Experimental Findings: Successful experiments reveal optimal conditions:
- Temperature: 24.0 °C
- Light Intensity: 45%
- CO2 Levels: 450 ppm
- Oxygen Production: 24.3 mL/h

Limiting Factors in Photosynthesis

Finding Optimal Parameters: Experimenting demonstrates that the ideal light intensity is affected by temperature.
Low Light Impact on CO2: Low light intensity can reduce available CO2, complicating attempts to determine ideal CO2 levels.

Light Wavelength and Photosynthesis

Color Influence: Certain light wavelengths enhance photosynthesis; notably, blue (450 nm) and red (650 nm) are most effective, while green (550 nm) is poorly absorbed.
Color Reflection and Photosynthesis: Leaves reflect colors, which explains why green light results in low photosynthesis rates—plants predominantly absorb blue and red light.

Practical Applications

Temperature Effects on Oxygen Production: Adjusting temperature within a specific range did not enhance oxygen production in experiments.
CO2 Level Adjustments: Increasing CO2 levels led to a rise in oxygen production, highlighting its role as a limiting factor.
Identifying Limitations: Each row of experimental data pinpoints limiting factors:
- Temperature: 25 °C, 15 °C, 30 °C
- Light Intensity: 60%, 20%, 50%
- CO2 Level: 700 ppm, 200 ppm, 400 ppm
Limiting Factors Identified: Different conditions reveal varying limiting factors such as light, CO2 level, and temperature across experiments.

Importance of Limiting Factors for Agriculture

Greenhouse Practices: Farmers need to identify limiting factors to optimize conditions for plant growth and enhance photosynthesis efficiency.

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Description

Explore the key concepts of photosynthesis with these flashcards. Test your knowledge on oxygen production, the role of light intensity, and more. Perfect for students studying plant biology and related topics.