Title: How Different Colored Lights Affect the Growth of Plants
Introduction:
This experiment had multiple objectives. The first objective was to establish what colors of the light spectrum photosynthesis uses. The second objective was to determine which colors in the light spectrum help a plant to grow faster, and which slow the growth of a plant down.
In photosynthesis, light energy from the sun is absorbed and reflected. When a plant has green leaves, the leaves appear green because the pigments inside the plant reflect the green light into our eyes and absorb the other colors in the light spectrum. The energy absorbed goes into Photosystem II and begins photosynthesis in the plant. The pigments inside of the cell are responsible
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There were two predictions for this lab. The first prediction was if the red light is used, then the plant will grow faster. The second prediction was if the green light is used, then the plant will grow slowly. There were also two hypotheses used in this lab. The first hypothesis was that plants will grow faster when a red light is shined on it during synthesis. The second hypothesis is that a plant will grow slowly when a green light is shined on it during photosynthesis. The control variable in this lab was the amount of time the plants grew, the independent variable was the light filters, and the dependent variable was the plant’s …show more content…
The first hypothesis of this lab was proved false. The first hypothesis of the red light making plants grow the fastest was wrong because the blue light filter made it grow an inch to an inch and a half taller than the red. In the experiment with lettuce, the plants under the red light grew to be 11 centimeters, while the plants under the blue light grew to be 12 centimeters. In the second experiment, plants under the blue light grew to become 14.5 centimeters, while the plants under the red light grew to be 13 centimeters. The second hypothesis, which said that the green filter would make plants grow the slowest, was both correct and incorrect. It was wrong because, in the first experiment, the green filter made the plants grow to 10 centimeters, while the orange filter made the plant grow to be 6.5 centimeters. In the second experiment, the plant under the green filter grew to 1.2 centimeters, which is 6.8 centimeters less than the second smallest plant under the orange
In Burns Bog and Watershed Park, the light was blocked at certain times because of the cover of the trees. Light intensity affects the rate of photosynthesis as with more sunlight, more carbon dioxide can be produced for the plants to grow. The types of vegetation is affected by light intensity as when the amount of sunlight decreases, the growth decreases as well. This is why SWMA has more grass plants such as, Aster and Colonial Bent Grass. According to the Spearman's Rank Correlation Coefficient, the correlation coefficient of light intensity and Aster is 0.4.
The data observed and recorded in this lab shows that the concentration of miracle gro’ does affect the growth rate and germination speed of black eyed peas. The data is shown through two graphs and two data tables. The control group in this experiment is the seeds with a 0% concentration of miracle gro’, therefore the seeds with just water. The experimental groups are different concentrations of miracle gro’ including a 10%, 15%, 20%, 25%, and 30% concentration. The variable in this experiment is the amount/concentration of miracle gro’.
a biology class wants to perform an experiment to investigate the effect of different colors of light of green, yellow, red and clear cellophane and plant three seeds in each one. What part do the three seeds experiment? A,Confounding variables B.Independent variables C.Control variables D.Dependent variables 40. Iodine directly helps which of the following glands to function properly?
Respiratory System Diffusion Lab 1. Describe the changes that occurred to the salt and to the potato Numerous changes occurred to the salt and potato from the start to end of the experiment. At the starting of the experiment, the mass of the potato was 16.4 grams; while at the end the mass decreased, by 1.4 grams, to give a mass of 15.0 grams. Also, at the starting, the salt was completely white and was completely dry, at the end though the salt became wet, soggy and changed in color to yellow. Lastly, the salt on the potato spread out and not a lot of salt was found on the potato compared to the start of the experiment.
The hypothesis that was predicted was that there would be more green plants compared to albino plants. This was hypothesized based on the information given in a punnett square. Punnett squares predict that when two heterozygous green plants are breeded together there is a 3/4 probability their child will be green and 1/4 that that they will be
This is because, if the duration of germination is changed, then the rate of cellular respiration will be affected; and in this case, both variables (germination duration and rate) will increase as time increases. This hypothesis can be expected since a grown seed would probably require more sunlight than one lower in the stage of development. In the case that the hypothesis is rejected, the null hypothesis: if the duration of germination is changed, then the rate of cellular respiration will not be affected, would be
The purpose of the photosynthesis lab is to identify and observe the colors of pigments in a spinach leaf as they separate on chromatography paper. Photosynthesis is the anabolic process, or the process of making smaller particles into larger ones in metabolism, that plants use to convert reactants such as sunlight, water, and carbon dioxide into products of glucose and oxygen. Photosynthesis occurs in the chloroplasts of a plant cell where chlorophyll, a pigment, is used to allow the process to occur, while factors such as the amount of sunlight, water, and carbon dioxide affect how much photosynthesis occurs. Chromatography is the process of separating chemical mixtures by allowing chemicals to move over another substance (Woodford, 2017).The moving phase, or moving substance, is in one state of matter as it spreads across the stationary phase, or nonmoving substance, in another state of matter to be identified separately (Woodford, 2017). Chromatography works by adsorption, which means that as the molecules pass over the solid, the
The answer to our question in our introduction is that duckweed plants grow better in medium amounts of water. In this case, specifically 500 ml of water. Our hypothesis, however, was incorrect, for we believed the duckweed would grow better in the small amount of water. We had many errors in our experiment. For example, when we had the beakers on the window sill, the sun had evaporated some of the water.
Hypothesis If the germinating and dry peas are submerged in baths of water for twenty minutes, then the germinating peas will consume the most oxygen over dry peas. The warmer the temperature surrounding the vials, the faster the rate of oxygen consumption will be due to them requiring a more extensive output
In this experiment, the sodium bicarbonate increases the rate of photosynthesis. Which trial resulted in all the leaf disks floating the fastest? Explain why you think this happened? Lettuce.
Hypothesis: If four lights (UV Light, LED Light, Infrared Light, and Blue Light) are used to perform photosynthesis on a spinach leaf, then the spinach will respond most to the blue light and perform a more efficient photosynthetic process.
The most important result from this experiment is that it suggested that the increase of Carbon Dioxide, will drastically increase the growth mountain maple in the covered (from the sun) parts in a forest, in the meantime any increase in the temperature of the soil will nullify the increase of light, as we know is to be the main ingredient for photosynthesis. 5. The authors do not use any citations in the
A. Were the seeds in the “N” tube undergoing both photosynthesis and respiration, only photosynthesis, or only respiration? Use your results in Data Table 2 to support your answer. The seeds in test tube "N" underwent respiration. Respiration is always happening.
Because of the numerous amount of trees near the tree line, there is a greater probability that the trees will cast a shadow over the wild flowers and prevent the flower from absorbing potential sunlight which would delay or prevent growth. Wild flowers that occupy the open area in the middle of the old field, however, do have shadows cast upon them and can therefore absorb more sunlight compare to the shaded flowers. Other experimentations performed show support of the hypothesis that was formed in this lab. It has been shown that the competition for light has a strong influence on the growth of plants (Coomes & Allen, 2007).
Research Question: How does the presence of light impact the rate of transpiration in plants? Aim: The aim of this experiment was to investigate how the presence of light affects the rate of transpiration in plants. Hypothesis: As light intensity increases, the rate of transpiration (water uptake) in a plant increases.