Green Lettuce Experiment

Have you ever really wondered how different variables can affect how plants go through photosynthesis? Well, in this experiment, the purpose was to see how various environmental conditions can affect the overall photosynthetic capacity of a specific plant. The factors, light, darkness, cold, and heat were applied to see how the different components would affect the photosynthesis on spinach plants. Each group was given a different factor to test. Out group was given the light factor. The hypothesis for this experiment is that when adding light as a factor, the light will affect the overall plant photosynthesis.

This lab was conducted to discover which level of light (measured in lux) would make Spinacia oleracea leaf disks float the fastest. Lux (lx) is latin for light, and is the unit of measurement for light in the International System of Units (Rouse 2011). Light plays a key role in the process of photosynthesis and in this we are essentially measuring the rate at which Spinacia oleracea leaf disks convert a bicarbonate solution into oxygen. The oxygen then would bubble up, allowing

Duckweed is a small aquatic plant that is able to grow rapidly, making it the ideal specimen for our experiment. It is hypothesized that altering the amount of light received by duckweed will alter its photosynthetic rate. It is predicted that a lower light intensity will lower the rate of growth in duckweed.

Introduction: Photosynthesis can be defined as a solar powered process that removes atmospheric carbon dioxide and transforms it into oxygen and carbohydrates (Harris-Haller 2014). Photosynthesis can be considered to be the most important biochemical process on Earth because it helps plants to grow its roots, leaves, and fruits, and plants serve as autotrophs which are crucial to the food chain on earth. Several factors determine the process of photosynthesis. Light is one these factors and is the main subject of this experiment. The intensity of light is a property of light that is important for photosynthesis to occur. Brighter light causes more light to touch the surface of the plant which increases the rate of photosynthesis (Speer 1997). This is why there is a tendency of higher rates of photosynthesis in climates with a lot of sunlight than areas that primarily do not get as much sunlight. Light wavelength is also a property of

-Measuring the pH of a solution (such as in the lab we had) could also help determine the rate of photosynthesis. You would need a much more specific pH meter, but generally, if pH goes down, the level of CO2 is higher, meaning more cellular respiration. Higher pH means there’s less CO2, so more photosynthesis.

When using algae beads and a CO2 indicator, the process of Photosynthesis and Cellular Respiration can be measured. In this experiment the intensity of light will be altered in each trail, and the rate of Photosynthesis will then be measured. As you rise from low light intensity to higher light intensity, the rate of photosynthesis will increase because there is more light available to drive the reactions of photosynthesis. However, once the light intensity gets high enough, the rate won’t increase anymore since there will be more-light than water and CO2; there will not be enough components from light, water, and CO2 to create the process of Photosynthesis. As CO2 dissolves and the amount of CO2 goes up, the pH will lower, which means the solutions color will change varying form red, orange and yellow, all pending on what the pH is at. CO2 will be produced from respiration, all while photosynthesis absorbs the CO2. This means that when the rate of photosynthesis is less than respiration, pH levels will decrease, and CO2 concentration will increase. Vis versa, when pH levels increase

I filled three clear cups, the first one with dH2O, the second with 0.1% NaHCO3 solution (equal parts 0.2% NaHCO3 and dH2O), and the third with 0.2% NaHCO3 solution. The control of the experiment is the cup with dH2O. The independent variable is time and the dependent variable is the number of disks floating in the solution. We separated the 30 disks into three groups of 10, placed them in syringes filled with a corresponding solution (either dH2O, 0.1% NaHCO3, or 0.2% NaHCO3), and removed all air from the syringe. This causes photosynthesis to stop in the disks, which then causes the disks to not float any longer. The three groups of disks were placed in each cup filled with 100mL corresponding to the solution, then placed under a light source and started a timer. For each minute in 15 minutes, data regarding the number of disks that floated to the top of each

The rate of photosynthesis can be determined different ways. Because oxygen is a product of photosynthesis and the Elodea plant is submerged in water, the oxygen is released in bubbles that rise to the surface of the water in the beaker. In this experiment, the rate of photosynthesis for each degree of light intensity can be measured by counting the number of bubbles released every 30 seconds for five minutes at each distance. The rate is the number of bubbles released per minute.

The purpose of this lab is to determine the relationship between photosynthesis and cellular respiration.The effect of Light Intensity experiment will show the rate of photosynthesis based on the amount of light from the light bulb, temperature, and direction and distance of the light, these variables determine the absorbance. In the effect of Light Wavelength experiment, photosynthesis is affected by different light colors. Photosynthesis in this experiment is more successful with certain colors due to different pigments in chloroplasts only absorbs certain wavelengths. The rate of photosynthesis will be estimating oxygen production in spinach leaf using floating leaf disk procedure. The more floating disks, the more oxygen being produces

Purpose: In doing this lab, the objective was to find how the intensity of light effects the of the products of photosynthesis. This lab will measure to what extent production of photosynthesis increases when light intensity is increased. This experiment will not only provide a visual representation of the process, but will also allow for further examination of the relationship between photosynthesis and cellular respiration. Introduction: The process of photosynthesis uses energy from the sun to produce glucose for plants, and cellular respiration takes glucose and oxygen to form carbon dioxide and water.

Different colors absorb different wavelengths of light. Usually, the color that one sees is the reflection of the color of that object. Plants are green due to the pigment chlorophyll; consequently, green reflects off of the plant while other colors are absorbed.  In class, we wanted to support the fact that photosynthesis is guided by the wavelength of light absorbed. The basis of this experiment is that different wavelengths of light excite photons at different rates. Because of previous knowledge about how distinctive wavelengths of light affect the rate of photosynthesis, we decided to test the rate of photosynthesis when using red light, green light, and white light. We hypothesized that red light would have a faster rate of photosynthesis

However, the photosynthetic process can be affected by different environmental factors. In the following experiment, we tested the effects that the light intensity, light wavelength and pigment had on photosynthesis. The action spectrum of photosynthesis shows which wavelength of light is the most effective using only one line. The absorption spectrum plots how much light is absorbed at different wavelengths by one or more different pigment types. Organisms have different optimal functional ranges, so it is for our benefit to discover the conditions that this process works best. If the environmental conditions of light intensity, light wavelength and pigment type are changed, then the rate of photosynthesis will increase with average light intensity and under the wavelengths of white light which will correspond to the absorption spectrum of the pigments. The null hypothesis to this would be; if the environmental conditions light intensity, light wavelength and pigment type are changed, then the rate of photosynthesis will decrease with average light intensity and under the white light which will correspond to the absorption spectrum of the pigments.

Because chlorophyll-a takes in violet-blue, and orange-red lights to use in photosynthesis, it reflects green, and that is the color we see. This study investigates the relationship between the wavelength of light and the total respiration of the plant Elodea. The purpose is to see the effect of the presence or absence of certain wavelengths can have on the process of photosynthesis. Because Elodea is a plant that reflects green light, it can be assumed that red lights, the complimentary color to green will be absorbed the most contributing to the process of photosynthesis and respiration making the most oxygen.

The Effect of Light Intensity and Temperature on the Rate of Photosynthesis Aim The aim of my experiment is to determine whether intensity of light and temperature would affect the rate of photosynthesis in a plant. To do this, I will place a piece of pondweed in varying light intensities and temperatures, and observe the amount of oxygen being given off. I am using pondweed because of its unusual quality of giving off bubbles of gas from a cut end, when placed in water. Introduction Photosynthesis occurs only in the presence of light, and takes place in the chloroplasts of green plant cells.

In this experiment, the alternative hypothesis was supported by the results. The alternative hypothesis state that, the different colors of light will have an effect in spinach (Spinecea olerace), in the results session, it is visible that every color of the light has a measurable impact on the amount of energy that S. alerace absorbed. The colors that showed to have the biggest effect in Spinach was Red lite and white lite. The red light demonstrated to have the higher amount of energy that spinach can absorbs. The tube that showed the lowest amount of energy was the foil tube, because it was cover from any source of light. Also, this tube tested that plants that do not received light, like the foil tube, did not capture as many energy as