2B study guide Essay

Measuring the Rate Oxygen Production using an Oxygen Electrode Chamber in Photosynthesis of Spinacia oleracea with Varying Light Intensities

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.

Therefore measuring the percentage of O2 in the container will be measuring the rate of photosynthesis. As there was no increase in the amount of O2, this would

c. Light would also affect how plants distribute like millipedes. In order to modify this experiment to work with plants, the heat lamp on the first group would be removed. Instead of

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

The purpose of this lab is to observe the effect of white, green, and dark light on a photosynthetic plant using a volumeter and followed by the calculation of the net oxygen production using different wavelengths color of white and green light, and also the calculation of oxygen consumption under a dark environment, and finally the calculation of the gross oxygen production.

Describe how energy derived from the sun is used by plants to produce sugars (photosynthesis) and is transferred within a food chain from producers (plants) to consumers to decomposers.

My lab partners and I performed an experiment that involved placing spinach disks into separate cups of distilled water (dH2O) and 0.2% sodium bicarbonate (NaHCO3) solution to examine photosynthesis in leaf tissue (Department of EEB, 2015). Discovering that the spinach disks quickly floated to the top of the 0.2% NaHCO3 solution and not in dH2O, we wondered if varied concentrations of carbonation would affect the rate of photosynthesis (PS). We tested this by halving the 0.2% NaHCO3 solution (using equal parts dH2O and 0.2% NaHCO3 solution to make 0.1% NaHCO3 solution). I hypothesize that if the spinach disks are placed in the 0.1% NaHCO3 solution, then they will have a slower PS compared to the disks placed in 0.2% NaHCO3. CO2

a. From the spectroradiometer data, plot the spectral reflectance curves for the 3 non-vegetated target types and 2 vegetation types. Display all spectral curves on one graph (graphs should be properly labeled). (3)

Our results indicate that green chads float at a faster rate when exposed to red light than reddish purple chads. A higher oxygen production rate allowed the chads to float. Because oxygen is a product of photosynthesis, we can conclude that a higher rate of floating chads indicates a higher rate of photosynthesis. Therefore, the green chads photosynthesized at a faster rate than the reddish-purple chads Conclusion/Context: Our data supported our hypothesis.

The intention of this experiment is to determine the effects of pH on the rate of photosynthesis in living leaves. Photosynthesis is a process by which plants convert light energy captured from the sun into chemical energy which they use to perform various plant functions. During the photosynthesis process, light, carbon dioxide, and water react to produce products: sugar and oxygen. The equation for photosynthesis is:

Introduction: Photosynthesis is the process that converts carbon dioxide into sugars, such as glucose, using energy from the sun and other lights. When light is absorbed by the pigments in the leaf, the energy absorbed is used to incorporate the carbon dioxide into organic molecules in a process called carbon fixation. The equation for photosynthesis in words is carbon dioxide + water (light energy) → Glucose + Oxygen. In numbers it is 6CO2 + 6H2O → C6H12O6 + 6O2. This lab used leaf disks to evaluate the net rate of photosynthesis under various lighting conditions, light, ambient light, and dark. The lab members assessed the leaf responses under sunlight or ambient light. Leaf disks normally float, however when the air spaces are pervaded with carbon dioxide, the overall density of the leaf disk increases and

The photosynthetic rates of Camomba Caroliniana, were effected by the color of light it was exposed to during the experiment. As seen in Table 1, Camomba Caroliniana that was exposed to green light had an average photosynthetic rate of 0.13 mL O2 produced/g/hour, which was lower than the photosynthetic rate of Camomba Caroliniana that was exposed to white light (0.19 mL O2 produced/g/hour). The data from table 1 can also be used to determined the reliability of the experiment, the standard errors for green and white light are relatively small, 0.02 and 0.01, respectively. This means that there is less variation in the experiment, but the experiment involving white light is slightly more reliable because its standard error is smaller. The 95%

photosynthesis happens in two stages: light reaction and carbon fixation also known as calvin cycle.light reaction TAKES PLACE IN THYLAKOID USE light energy to produces atp and nadph whereas, calvin cycle takes place instroma uses energy derived from light dependent reaction to make GA3P from CO2 ( Bio166 lab execise manual, 2015). the purpose of this experiment was to separate plant

Photosynthesis can be measure in three ways: amount of carbon dioxide used, rate of oxygen production, or the rate of sugar formation. NPP refers to the organic material that remains after photosynthetic organism use oxygen, produced by photosynthesis, for cellular respiration. Calculate GPP and NPP using the equation