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They do this by a process called Photosynthesis.

Background Knowledge: Photosynthesis is the process by which plants make their own food.

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I will use this because it is one of the reactants of photosynthesis.

Solar energy turns the water in the plants into a vapour causing it to evaporate into the leafÂ’s internal air spaces before diffusing out of the stomata into the air....

 · - if a plant cannot absorb enough water, then the rate of photosynthesis decreases.



The factors that affect the are:

· Light intensity- if the light is brighter, then the rate of
photosynthesis increases and visa versa.

what factors affect the rate of photosynthesis?

Our experiment tested which color (red, blue, green) would influence the plant to produce the most amount of photosynthesis. There are four main photosynthetic pigments found in the chloroplast of the plant called chlorophyll a, chlorophyll b, xanthophylls, and carotenes. All these pigments absorb light and possibly utilize the light energy in photosynthesis. Light energy is essential for photosynthesis. An initial experiment showed that all the pigments at peak absorbance showed violet/blue light at the highest level, orange/red light as the second highest, and yellow/green having the lowest level of absorption. We hypothesized that photosynthesis was affected by the light absorption rate.

More light can mean more photosynthesis. It doesn’t necessarily mean more though. When wethink of photosynthesis as a process, we can seethat there are at least three things that canlimit the process: light, water, and carbondioxide. More light won’t help if we don’thave enough water and carbon dioxide.

how does light intensity affect the rate of photosynthesis?

To test this we used about 5 grams of leaves for each trial, and placed them in a gas chamber. On two sides of the gas chamber we placed two clear containers filled with water to serve as the temperature regulators. Behind the water containers we placed lights directed at the plant. We ran three trails for each different leaf we used. Each trail consisted of measuring the amount of CO2, with a CO2 gas sensor under blue light, red light, and green light. We made sure to switch the order of colors in each trail as an experimental control, to minimize error. Since we know that photosynthesis requires CO2, and we know that blue light pigments absorb the most light energy, we predicted that under blue light the most CO2 would be used.

For the
plant to keep on photosynthesising at a steady rate there needs to be
plenty of water and the temperature needs to be kept at a certain
level because once carbon dioxide is no longer the limiting factor
simply giving the plant more wont have any effect.

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  • what apparatus can you use to measure the speed of photosynthesis?

    Three factors can limit the speed of photosynthesis: light intensity, carbon dioxide concentration and temperature.

  • Factors affecting the rate of photosynthesis

    Three factors can limit the speed of photosynthesis: light intensity, carbon dioxide concentration and temperature.

  • Factors Affecting Rate of Photosynthesis- FlexiPrep

    Photosynthesis consists of a number of photochemical and enzymatic reactions.

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Factors Affecting The Rate Of Photosynthesis - …

Our results are contradictory with our hypothesis, based on our statistical results. There were several problems with our experiment that could have been taken into consideration. First, when taking respiration rates the foil wasn’t covering the chamber all the way letting some external light in. Second, the colored cellophane only allows approximately 70% of light through; this might have prevented the plant from absorbing the amount of light energy needed to have a significant photosynthetic rate. Third, the fast paced moving between trials lost time and efficiency. By having short trials (2.5 min.) we might not have allowed the plant enough time to adjust its photosynthetic rate to the different wavelengths of light energy. Plus by moving the plant, and switching from cellophane to foil (or vise versa), might have screwed up the photosynthetic cycle by exposing it to white light.

Investigation into the Factors Affecting The Rate Of Photosynthesis



· Temperature- if the temperature increases, then the rate of
photosynthesis also increases, (however, temperatures above 40OC can
damage a plant and photosynthesis stops because the chlorophyll gets
too hot).

Factors affecting the rate of photosynthesis - …

Other students who did the same experiment had results that also supported that blue light was not responsible for the rate of photosynthesis. Experiments Warsh et al. 2001, Bahramzadeh et al. 2001, and Whorley and Weaver. 2002 all showed that red had much higher rates of photosynthesis than blue, but these experiments had fewer trials or shorter trials. Lots of other students also used white light as a controlled variable; this would have been a good thing to put into our experiment to give it some comparison.

Which factors affect the rate of photosynthesis

Actually, most places on Earth have the sameamount of carbon dioxide in the atmosphere, but aplant can only get it by opening holes in itsleaves. These holes are too small for you to seewithout a strong microscope, but they are bigenough to let water vapor out of the plant. Sowater is an important limit on a plant. Morelight is actually a problem if water is scarce,because even more water will evaporate from theplant.

What factors affect the rate of photosynthesis? - Quora

Any acceleration in the process of photosynthesis will naturally result in the production of more organic compounds and consequently more plant growth.

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