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.
The chemical equation for photosynthesis can be expressed as:
(light)
6CO2 + 6H2O-------------- C6H12O6 + 6O2
(In the presence of chlorophyll)
The word equation:
Carbon dioxide + Water------------ Glucose + Oxygen
The fact that all plants need light in order to photosynthesise has
been proven many times in experiments, and so it is possible to say
that without light, the plant would die. The reason that light
intensity does affect the rate of photosynthesis is because light is
the source of energy which, falls on the chloroplasts in a leaf and is
trapped by the chlorophyll, which then makes the energy available for
chemical reactions in the plant. Thus, as the amount of sunlight, or
in this case light from a bulb, falls on the plant, more energy is
absorbed, so more energy is available for the chemical reactions, and
so more photosynthesis takes place in a given time.
The...
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...ary the amount of CO2. The plant would be
kept at a constant distance from the lamp and a constant volume of
water would be added to the sodium hydrogen carbonate. Another
experiment using almost identical apparatus would be to vary the color
of the light the plant absorbs. Using translucent color filters in
front the lamps could vary this. Since light wave length has already
been identified as a variable of photosynthesis, it would be
interesting to actually test it. The only problem of this experiment
is that there is no way to define or "measure" the color of light.
Wave length would be a solution but this cannot be measured with
available equipment. We only have a general idea of how to class
colors. Because of this, the colored light experiment should not be
taken as seriously as light intensity or carbon dioxide.
Increasing the light intensity will make photosynthesis faster. Variables: In this experiment there are a few things we have to keep the same.
Investigating the Effect of Light Intensity on the Size of a Plantain Leaf Title: To investigate the effect of light intensity on the size of a plantain leaf. Hypothesis: I predict that the size of the plantain leaves would increase as the light intensity decreases. Therefore, plantain leaves found in the shade will have larger surface areas than leaves found in an open area. Theory: Sunlight is an essential factor need to complete the process of photosynthesis.
As the light is increased so would the rate of photosynthesis. Apparatus: boiling tube, 250ml beaker, bench lamp, ruler, sodium
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.
The Effect of Light Intensity on the Rate of Oxygen Production in a Plant While Photosynthesis is Taking Place
= > [CH2O} + O2 + H2O, This shows that when the light intensity is increased the rate of reaction will be more quicker he only anomalous result there was, is the one in the 100 watt result the reading after 5 minutes is anomalous because it does not follow the predicted pattern of increasing in the production of gas because it is lower I know from my own knowledge of photosynthesise that when the light intensity is increased the rate of reaction will be more quicker because many plants and trees photosynthesise quicker in stronger light and photosynthesise slower in dimly lit places. The chlorophyll absorbs light energy and enables it to be used by the plant for building up sugar. The overall effect is that energy is transferred from sunlight to sugar molecules.
To make the test fair I will use the same amount of water and the leaf
To make sure that my test is fair I will make sure to keep all the
The Effect of Light Intensity on Photosynthesis Of Elodea Canadensis Introduction I wanted to find out how much the light intensity affected the Photosynthesis in Elodea Camadensa. I decided to do this by measuring the amount of oxygen created during photosynthesis. Photosynthesis is the procedure all plants go through to make food. This process uses Carbon dioxide, water and light energy. It produces Oxygen and Glucose.
The Effect of Light Intensity on the Rate of Photosynthesis in an Aquatic Plant Introduction The input variable I will be investigating is light, as light is just one of the 4 factors required in the green-plant process of photosynthesis. Photosynthesis is the process by which green-plants use sunlight, carbon dioxide, water & chlorophyll to produce their own food source. This process is also affected by the temperature surrounding the plant (the species of plant we experimented with, pond weed, photosynthesised best at around 20 degrees centigrade.) Light, temperature & CO2 are known as limiting factors, and each is as important as the next in photosynthesis. Light is the factor that is linked with chlorophyll, a green pigment stored in chloroplasts found in the palisade cells, in the upper layer of leaves.
* Count the number of bubbles seen in 1 minute which is a way of
The second part of this lab deals with photosynthesis. This lab has several experiments. In the first experiment students will learn about the effects that different colored test tubes have on photosynthesis in elodea sprigs.
The reason light intensity is being used compared to whether or not a plant needs light. It is because The experiment wants to show that the rates of photosynthesis will vary according to how much light from a light bulb will be trapped in. the chloroplasts, in the leaf. The more energy trapped the more efficient a chemical reaction can take place and the speed of photosynthesis will increase. There are many things which can affect the photosynthesis of a plant such as light intensity, temperature and carbon dioxide levels.
This is the same if there is the light intensity is too high as this can damage the chloroplasts in plants and this will minimize the rate of photosynthesis. As shown in the graph as the light intensity increases, the photosynthesis rate increases until a point is reached where the rate begins to level off into a plateau. At a low light intensity, photosynthesis occurs slowly because only a small quantity of ATP and NADPH is produced. As the light intensity shown in the graph is gradually increasing, more ATP and NADPH (NADH is used in cellular respiration and NADPH is used in photosynthesis) are produced, which means more oxygen and sugar is produced, therefore increasing the rate of photosynthesis. But as the light intensity increases even more and past a certain light intensity on the graph, this is due to the other factors such as carbon dioxide limiting the rate of
Photosynthesis is the process in which living cells from plants and other organisms use sunlight to produce nutrients from carbon dioxide and water, the image below “Diagram of photosynthesis 1,” helps show this process. Photosynthesise generally creates oxygen as a by-product through the use of the green pigment, chlorophyll, found in the plant that helps this reaction occur. “Photosynthesis provides us with most of the oxygen we need in order to breathe. We, in turn, exhale the carbon dioxide needed by plants,” (factmonster,2017). This is able to show us why photosynthesis is so greatly needed to occur through plants in order to give one another essentials needed for continuity of life. “Plants perform photosynthesis because it generates the food and energy they need for growth and cellular respiration,” (photosynthesieeducation, 2016).