With the possible exception of the elodea plant and a test tube, all the other items can be purchased from the local supermarket, hardware, homebuilding or big box retail Wal-Mart, Target, etc store. Thus some internal factor is present in the protoplasm of the cells. Different plants show different rate of 1 photosynthesis under different quality of light. Light is a limiting factor at low intensity. As light is no longer the limiting factor of photosynthesis, it will then photosynthesize at a high rate until another variable becomes a limiting factor. Altering the amount of carbon dioxide given to the plant can also alter the rate at which photosynthesis occurs. Light intensity is usually defined as the energy hitting an area over some time period.
Second part is on another experiment similar to yours that some kids did. A limiting factor could be the amount of chlorophyll molecules that are absorbing the light. According to this hypothesis, when a process is influenced by a number of factors, the rate of the process is limited by the slowest factor. The compensation point These graphs have been plotted with rate of photosynthesis against the factor under investigation. Oxygen is a waste product.
From this, the risk assessment is quite low but it should not be ignored. I also found that there was not much point in having the lamp any further away than 70cm because very little photosynthesis occurred. In short, the intensity and the wavelength of light both affect the rate of photosynthesis. The energy for the process comes from light and a green pigment called chlorophyll which allows the plant to transfer the energy from light to sugar. The increases in bubbling gas production as the light source is moved closer to the plants indicate that the rate of oxygen production by the photosynthesis is affected by the intensity of the light source. Chlorophyll Chlorophyll absorbs the light energy required to convert carbon dioxide and water into glucose. To aid students in their practical work, a set of simple experiments are described and explained along with a comprehensive further reading list is included.
This helps making the test valid because you will be able to stop the clock at the same specific shade of purple for each test tube of pondweed. This substance is essential for photosynthesis. To the next comment, hypothesis? This equation simply means that carbon dioxide from the air and water combine in the presence of sunlight to form sugar and oxygen is released as a by-product of this reaction. Go through the method and picture doing the experiment. Approximate Time Required to Complete the Project 2 Days This project focuses on the production of oxygen by plants during the photosynthesis process.
Alhtough I am quite puzzled myself at why there was sometimes a decrease in percentage increase, even through extentive research I have been unable to find the answer. Going up on the graph shall be the amount of bubbles and going across on the X axis will be the measurement. The second part of the experiment tested the effects of different frequencies of light on photosynthesis. First clip that end of the pondweed that was not cut. Light is a very important factor when it comes to the process of photosynthesis, without light the reaction cannot be carried out and no glucose can be made. In addition to the three main factors above are other factors such as chlorophyll concentration, water and pollution. Different plants require different intensity of light.
It was basically to testing to maximise growing crops in space, to minimise the space taken up by crops but to maximise the yield. Through reading various books and web pages it was made clear that carbon dioxide is definitely one of the raw materials needed for photosynthesis, but I wanted to see whether this is actually true and if carbon dioxide is taken away completely will the plant photosynthesize at all? Light and Translocation of C in Detached Blades of Sugarcane. D Light intensity has an impact on the rate of photosynthesis. High concentrations of oxygen inhibit the rate of photosynthesis. It gives green color and absorbs the necessary light for photosynthesis. But this is soon followed by a decline. The amount of water actually used in photosynthesis is very small.
Even though it is not abundant as Nitrogen and Oxygen which is a key part of life on earth; carbon dioxide also shares the same job as them. Light intensity is one of the factors that affect the rate of photosynthesis and that is what our experiment is based on: Aim: In this experiment we shall investigate how the rate of photosynthesis measured by the increased volume of oxygen is affected by changes of light intensity in water plants. Plan The plan or method I will be using will start of by placing a plant in a test tube filled with water. This substance is essential for photosynthesis. Therefore it means that increasing the light intensity will boost the speed of photosynthesis. Health and safety checked, September 2008 Downloads Download the student sheet with questions and answers Related experiments. Aim The aim of my experiment is to find out how light intensity affects the rate of photosynthesis.
Leaves with more chlorophyll are better able to absorb the light required for photosynthesis. Distilled water is one of the cleanest types of water. Light Intensity: Photosynthesis begins at very low intensity. The green cells produce starch in variegated leaves. Does plant growth consume a lot of energy or not much? Same thing happens when plants are transferred from dark to light. It is — 35 0 C for some conifers.
The purple spot diagram helps you decide when the water has gone red enough to record the result. Place the funnel on top of the elodea overturned, and place the test tube on top of the funnel. For a plant to photosynthesize, it needs carbon dioxide and water and sunlight, a factor of photosynthesis. So at any point in time if one of the three factors is in low supply, this factor will be the limiting factor. The amount of water actually used in photosynthesis is very small. It's going to take a lot of controlling through various other chemicals, and the process itself is very complex, so I'd imagine it'd eat up a decent amount of energy.
This is because photosynthesis is a reaction, which needs energy from light to work, so as the amount of energy available from light increased with the rise in light intensity, so did the amount of oxygen produced as a product of photosynthesis. Hypothesis: If one carbon dioxide source is removed, then the rate of photolysis will remain constant because carbon dioxide is not needed for photolysis. This control the rate of the process which in this case is the light intensity. Aim: To find out if light affects the rate of photosynthesis through an investigation with leaf discs of a spinach leaf. Variables The input variable which will be used in this investigation will be the light intensity this will be a 100Watt bulb being moved closer and further away from… 2500 Words 10 Pages fossil fuels becomes more prevalent in industries throughout the world, the emissions of carbon dioxide inevitably increases and cause a surplus of the gas in the environment. The answer is letter D. Organisms which are capable to photosynthesize are called photoautotroph.