Willow Tree Experiment

The purpose of this experiment was to investigate the effects of light intensity on the rate of photosynthesis in a Moneywort plant. By observing the plant in distilled water mixed with sodium bicarbonate, different light bulbs were targeted onto the plant. The measurement of the amount of bubbles present on the plant during the trial of the experiment enabled us to identify the comparisons between the activity of the light and the process of photosynthesis.

In this lab, four different types of leaves were tested to see the rate at which each leaf photosynthesized. This lab demonstrates how plants store light, capture light, and use light as energy for reproduction and growth, by photosynthesis. The control in this experiment was spinach, which was tested before any of the other plants were. The other plants that were tested were English Ivy, C4 Plant, and a multicolored plant. Each type of leaf was tested in a sodium bicarbonate solution and a solution of distilled water. It will be shown in the discussion whether the hypothesis made was correct or incorrect. It will be shown in the discussion what could have

Photosynthesis. Springer, New York, New York. Campbell, N.A. 2002. Biology, 6th ed. Benjamin/Cummings Publishing Co,

Salicylic acid is an extract of willow bark, and Hippocrates, Galen, Pliny the Elder knew that this bark could ease pain and reduce fevers. Although Reverend Edward Stone was the one who noted that the willow bark was effective in reducing fever, due to the salicylic acid, back in 1763, it caused damage to the mucous membranes of the mouth and esophagus, which caused hemorrhaging of the stomach lining. It was a scientist at the Bayer Company in Germany that noted the salicylic acid contained a phenol group that might cause the damage. He then decided to modify the acid by forming an ester with two-carbon acetyl group. As a result, the substance created was acetylsalicylic acid: aspirin.

Although, some factors that could have influenced this experiment was heat given off by the lamps, the restriction of the gas chamber, and how much CO2 there was in the chamber. Photosynthesis is also very heat sensitive, which is why when recording the O2 rates in the dark the lamp still needed to be on. The gas chamber restricted the flow of the natural environment along with already having a certain amount of CO2 in the chamber that wasn’t measured. These could have influenced the

Plants occur around the world in a wide variety of environments, but how does the environment affect photosynthesis rate? Temperature, light intensity, water supply, and the amount of carbon dioxide are all factors that contribute photosynthesis rate. For the lab on photosynthesis, our group tested the Anacharis Bunch plant, which is an aquatic plant that needs moderate light in order for photosynthesis to occur (“Anacharis (Egeria densa)”). For photosynthesis to take place, energy from the sun is required. When sunlight strikes a plant, the stoma opens and carbon dioxide along with energy from the sun are absorbed into the chlorophyll as well as water which is transported up through the leaves to the chloroplasts where the chlorophyll are located. The chlorophyll then uses carbon dioxide, water, and the sun’s energy to produce to sugars such as glucose. After the glucose is produced, the energy that is stored in the glucose is then used to form ATP, which is carried throughout the plant and into the chloroplast where the energy is used for photosynthesis and other cellular functions. As a byproduct of synthesizing, a plant releases oxygen and water into the air. Then the cycle of photosynthesis which is made up of two parts, the Light Reactions and the Calvin Cycle, start all over again (“A Primer on Photosynthesis”). To figure out the rate at which the Anacharis Bunch plant photosynthesizes under different conditions, my group and I decided to test the

For lab 12, it is hypothesized that chlorophylls a and b are present in a plant leaf and contribute to the starch production in photosynthesis. Also, products of photosynthesis will be present in leaf tissue exposed to red and blue light wavelengths for several days, but a decreased presence in leaf tissue exposed to green and black light wavelengths. In lab 13, it is expected that since chlorophylls a and b are more polar and smaller molecules than the anthyocyanins and carotenoids, they will travel higher up the chromatography paper than the other pigments.

Our hypothesis was rejected because the plant in the cold temperature of 0°Celsius, had the greatest amount of oxygen produced from the starting point of 24% with a 1.60% increase. The room temperature of 23.33°Celsius was a close second with a 0.70% increase from the initial amount of 24%. The hot temperature of 40°Celsius was the lowest with a decrease of -2% from the starting amount of 24%. We noticed that the amount of oxygen produced increased as the temperature decreased. Though we believe if the temperature was lower than 0°Celsius then our results would be different, and the plant wouldn’t produce as much oxygen. The rate of photosynthesis depends on: light intensity, temperature, and the availability of carbon dioxide, and water. When

The purpose of the photosynthesis lab is to see to how fast photosynthesis occurs in a leaf in relation to different color lights. We changed the dependant variable to see how the different colors of light affects the overall time it takes for photosynthesis to take place and the leaf disc to rise. My hypothesis suggested that if the beaker had a colored lid on top of it, the light color will affect the rate of the leaf disc rise compared to the beakers with white (regular) light or no light. As it turns out, my hypothesis was supported and correct. The color of the lid did affect the rate photosynthesis occurred. The reason the leaves float to the top is because, during the photosynthesis process, oxygen bubbles form in the leaf, thereby making the leaf float.

In conclusion to the experiment, it was discovered that all of the substances being tested showed respiration except for the non-germinating peas. The trends in the most of the graphs showed the level of oxygen decreasing while the amount of carbon dioxide increasing. In comparison to the other groups, the overall trend was similar although some groups did not follow the exact protocol. The cold germinating peas inhibited oxygen consumption, however they were still respiring since they had to regain energy from their cold environment. According to The Journal of Research in Science and Teaching, it is important to understand that this photosynthetic process relates to cellular respiration because photosynthesis creates the glucose that is

INTRODUCTION Enzymes are proteins which exist for the purpose of speeding up reactions without being consumed by them (Mader, 2010.) The actions of enzymes can be directly affected and altered by changes in the environment which include but are not limited to increase or decrease in temperature, pH levels or concentration. The first part of the experiment focuses on a particular enzyme driven reaction known as photosynthesis. Photosynthesis acts to fuel ecosystems and provide the Earth’s atmosphere with oxygen.

In a light- dependent reaction there must be light in order for it to undergo its process. This process is very fast and is used to split water and release oxygen, electrons, and protons. The light-independent reactions are biochemical reactions and convert carbon dioxide to sugar (Rathbone, 2016). This study was performed in order to help know the main fundamentals of photosynthesis in hands on experiments with spinach leaves.

In fact, it was Plant E which only received indirect sunlight. Plant A, by day twenty, had only grown to twelve and one-fourth of an inch whereas Plant B had grown to seventeen inches. Throughout most of the experiment, Plant A was never the tallest plant except for day(s) four and six. I believe the reason for this is due to the fact that since Plant A had a constant rate of light, it processed way too much energy for it to be a healthy intake. Therefore, my hypothesis was proven

The effect of chloroplasts on the growth of a plant Purpose: The purpose of this experiment is to determine how different factors affect the rate of photosynthesis. Hypothesis: If the amount of chloroplast relates to photosynthesis then it is predicted that the more chloroplast present in the leaf the more oxygen bubbles produced because the function of chloroplasts is to capture energy from sunlight and use it to conduct photosynthesis, without this organelle photosynthesis would be impossible diminishing rate of photosynthesis.

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