Both of these techniques measure NET photosynthetic rates.
In this experiment I will investigate how sodium hydrogen carbonate affects the rate of photosynthesis.
Measuring the rate of photosynthesis - Science and …
Following his experiments, Galileo formulated the equation for a falling body or an object moving in uniform acceleration: d=1/2gt2.
The distinguished French historian of science Alexandre Koyré states that the experiments reported in , to determine the law of acceleration of falling bodies, required accurate measurements of time, which appeared to be impossible with the technology of 1600.
Oxygen is evolved during photosynthesis but the conditions for maximum reaction rate are intriguing. It can be affected by many things, including: sunlight - its intensity and wavelength, temperature, CO2 and O2 availability, water (which closes stomata and restricts CO2), and any factor that influences the production of chlorophyll, enzymes, or the energy carriers ATP and NADPH, such as pH and Mg2+ availability. You could test the effect of pH and temperature. It sure won't be linear but how well your prediction (hypothesis) and results agree will be interesting. You could also try light intensity. If you don't have a "luxmeter" to measure intensity you could take advantage of the fact that as you double the distance of the light source to the plant, the intensity is quartered (but you'd have to cut out daylight). There are a lot of variables to control and complex biochemical reactions to examine.
Measuring the rate of photosynthesis ..
Corrosion of iron in salt water is a popular context for an EEI. It is topical, it is of great economic importance, and it makes a great experiment. A common way of determining the corrosion rate is to measure the weight loss of an iron nail after a wee in salt water. However, to get reliable results, a balance with a precision of 0.01 mg is required since the weight loss is quite small over the week. And who has a spare $10000 to buy such a balance? But here’s a good spectrophotometric method that can be done with some simple chemicals and a phone with a colour analyser app.
3) I don't know exactly what 'controls' the fuel feed rate in a wick. Is it the consumption rate by the flame or capillary action? Or most likely some combination of the two. You might end up supplying a similar mass or volume of fuel for your different cases, but that would give you much less fuel energy for the high water cases. If this expectation is correct then it should magnify the differences you see with different fuels. In my experiment I was able to overcome this since I was controlling fuel flow. You can at least track the fuel flow by measuring the weight of your burner+fuel. The mass-to-fuel-energy calculations ought to be good for a high schooler and add some time to your study.
Measuring the Rate of Photosynthesis - Stack Exchange
Heating the water to a higher temperature leads to a smaller voltage being required to achieve the same rate of hydrogen production (as measured by the electrical current). Alternatively, at higher temperatures, if the voltage is held constant then the current will increase and so will the rate of hydrogen output. So there is the basis for a good EEI. Make sure you pay attention to the controlled variables: electrode type and area, concentration of electrolyte, and so on. Because polarisation can affect the variables, it may be best to take your measurements quickly after the start. Note: rather than use an electrolytic cell, a similar investigation can be undertaken using electrochemical cells (as above). In that case the Nernst Equation applies and you can easily see how the absolute temperature is factored in.
Hydrolysis is, however, so slow that solutions of sucrose can sit for years with negligible change. In sucrose hydrolysis studies, the main way to measure the extent of the reaction is by using a 'polarimeter' which measures the amount of rotation of polarised light. Schools just don't own polarimeters but there is a simple method that involves a simple and inexpensive blood glucometer (see photo left). The test sensors are sophisticated high-tech products with integrated nanoscaled membranes and detectors. And they only cost about $17.
Measuring the Rate of Photosynthesis
The purpose of my work is to measure photosynthesis rate of ..
I am happy with the experiment as I proved that light intensity has an effect on the rate of photosynthesis.
photosynthesis lab - measure rate of photosynthesis by ..
The Plan In my experiment I am going to see how light affects the rate of photosynthesis.
It is possible to measure the rate of photosynthesis by ..
The rate of photosynthesis was measured at 4 other light intensities of 80, 350, 150, 60 and 0-μmol photons m-2 s-1.
Light Quality on the Rate of Photosynthesis Measure.
Vitamin C is sensitive to heat and oxygen and the degree of sensitivity depends on the pH of the solution. In food it can be partly or completely destroyed by long storage or overcooking. By refrigeration the loss of Vitamin C in food can be substantially diminished. An interesting EEI would be to see how some of these factors really affect a Vitamin C solution. You could start with some fresh fruit juice (eg apple, orange) or you could simulate fruit juice by making up an appropriate solution with added citric acid, some citrates, glucose/fructose and so on. Should you measure the concentration of the ascorbic acid with time (eg daily) or just measure after a week or two weeks? What will you control? What will your independent variable be: sugar concentration, [H+], light, oxygen, temperature? If you intend to measure the concentration as a function of time elapsed you .
Re: How do you measure the rate of photosynthesis in …
Thus, the air bubbles were an easy way to measure the rate of oxygen production per minute.
Exploring the Rate of Photosynthesis
Photosynthesis is a process of converting energy from the sun (photons) and storing it in the chemical bonds of sugars and other food molecules they make.
There are different methods to measure the rate of photosynthesis
This experiment, besides the trial error, was overall successful since it was able to stay consistent with the hypothesis.
Friday, March 7, 2014
By Miracelle Philosobaum
Hypothesis: If we place a plant under blue lighting, then the rate of oxygen production will increase, because it absorbs blue wavelengths and catalyzes photosynthesis.
Before the experiment, sodium bicarbonate is added to a container filled with tap water to create CO2-enriched water for the experiment.
Describe a simple experiment to measure the amount of ..
The second method is where you add your water to a tube (see photo below, centre) and add a melamine tablet and crush it. The solution will go cloudy and you raise the black dot on the bottom until you can just see it. A scale is on the lifter is graduated in mg/L. To be more accurate, you could prepare a set of standard cyanuric acid solutions and measure their turbidity in a spectrometer (λ max = 420 nm) after the test solution or tablet is added from the kit. This will allow you to prepare a standard curve from which your experimental solutions can be compared. A method for this was published in the journal. to download an extract.
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