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The simple process of photosynthesis bio 20
An essay of photosynthesis process
An essay of photosynthesis process
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Experiment to Show the Rate of Photosynthesis Aim: Experiment to show the rate of photosynthesis when pondweed is under different life intensities. Prediction: I predict that the closer the light is to the pondweed the (or the higher the light intensity) the more oxygen will be produced until a certain point where the temperature or carbon dioxide levels will be the limiting factor. The further away the light, the slower the oxygen bubbles will be produced so the less light the less photosynthesis will occur which is needed for the plant to make food. [IMAGE] The rate increases (A) but only to a certain extent. Then they don't increase any more because of the other limiting factors of the carbon dioxide levels and temperature. [IMAGE] Method: v Lamp v Sodium Hydrogen Carbonate v 1 Meter Ruler v Water v Beaker v Stopwatch v Pondweed v Measuring Cylinder v Scales * Set up apparatus like above with the light source 5 cm from the beaker and cut the end of the pondweed. * Some potassium hydrogen carbonate might have to be added which provides carbon dioxide for the plant which is needed for photosynthesis. Then wait for the plant to 'acclimatise'. * Count the number of bubbles seen in 1 minute which is a way of measuring the rate of photosynthesis. * A row of dots on paper while counting can represent each bubble counted. * Move the light 10cm away. Wait 2 minutes and then count the bubbles again. * Repeat this at 15cm, 20cm then 5cm intervals until the bubbling stops and repeat each measurement twice to get a more accurate result and find the average. Fair Testing: Changing variable: Light intensity Variables kept the same: * Amount of pondweed- Why: More pondweed, the higher the rate of photosynthesis How: Weigh pondweed with scales * Water to absorb heat distance
The main strength of this experiment, was that the measurements could be taken reasonably carefully, as the number of repetitions could easily and accurately be counted.
For both experiments, data were collected for thirty seconds.
Stand back and wait until soda is done spewing liquid completely. (Do not move/touch soda while it is still spewing. This may change the results of the experiment.)
at the small end of the axis to see a more reliable pattern. I could
Experiment #1: The purpose of this experiment is to investigate the effects of baking soda and light intensity on the rate of photosynthesis of green spinach leave through the observation of floating disk.
Investigating Factors that Affect the Rate of Photosynthesis in Elodea. Aim: To find out which factors affect the rate of photosynthesis in a systomic Elodea. A. Variables: The variables that might affect the rate of photosynthesis. in this experiment are: Temperature: When the temperature rises so does the rate of temperature.
To make sure that my test is fair I will make sure to keep all the
Results: The experiments required the starting, ending, and total times of each run number. To keep the units for time similar, seconds were used. An example of how to convert minutes to seconds is: 2 "minutes" x "60 seconds" /"1 minute" ="120" "seconds" (+ number of seconds past the minute mark)
Introduction: Photosynthesis uses the sun’s energy and uses it to convert carbon dioxide and water into sugar. There were two plants that stayed outside in the sunlight and two plants that were inside only receiving sunlight from the window. If the plants stay outside then they will grow at a faster rate and will be the tallest with most leaves because they receive more sunlight from the sun and have a fresher environment. Methods: Both the plants inside and outside were exposed to sunlight and given water every day. Results: The plants inside grew more than the plants inside. The plants outside did not last all of the weeks the experiment was being conducted.
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. Photosynthesis can be defined as the production of simple sugars from carbon dioxide and water causing the release of sugar and oxygen.
According to the “you tube video”, Frequency count is an observation tool in which we are able to count how many times a behavior is occurring. It can be used for a single child, a group of children or a whole classroom.
Every day before sleeping, I record the exact time and collect them to show the effectiveness of certain methods. This experiment could be divided into 3 steps:
So we can work out through this method that the volume of a box with
Investigating the Effect of Light Intensity on Photosynthesis in a Pondweed Aim: To investigate how the rate of photosynthesis changes at different light intensities, with a pondweed. Prediction: I predict that the oxygen bubbles will decrease when the lamp is further away from the measuring cylinder, because light intensity is a factor of photosynthesis. The plant may stop photosynthesising when the pondweed is at the furthest distance from the lamp (8cm). Without light, the plant will stop the photosynthesising process, because, light is a limited factor. However once a particular light intensity is reached the rate of photosynthesis stays constant, even if the light intensity is the greatest.
Sunlight fuels the planet and photosynthesis converts that solar energy into energy that plants transfer into the food chain. Photosynthesis provides plants with sugars and plant proteins that are important for animals as well as for human agriculture. Most people know the general idea behind it, but there are so many complicated processes that make up the entirety of photosynthesis. Different aspects of photosynthesis, the photosystems, and the photosynthetic pathways are still studied today because not everything about how they work and operate is known.