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Why do plants need sunlight to remain green?

An example of photosynthesis is how plants convert sugar and energy from water, air and sunlight into energy to grow.

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How does light intensity and duration affect plant growth?

The process was repeated 4 times for each color of light.
Graph one shows the number of chads floating when placed in various environments, each a different wavelength of light.
Data / Results
The question asked in this experiment was, “How do various colors of light affect the rate of photosynthesis of a spinach leaf chad?” The experiment was tested using spinach leaves (scientific name
Spinacia oleracea)
, beakers, different colored light bulbs, and a clamp lamp.

Photosynthesis need light to work, so light therefore should speed up the rate of photosynthesis.

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.

Effects of different colors of light on plant growth.

This is because the leaf is unable to continue to make food with out the help of sunlight.

Light intensity, this is kept the same by a heat shield, which in
this case is a beaker of water placed half way between the bench light
and the pondweed.

Repeat this Experiment:

In another experiment, Ingenhousz, placed a small green aquatic plant in a transparent container of water and exposed the container to bright sunlight.

The effect of light on seed germinationWhat is Transpiration?

Any light that does not have enough or has too much energy can not be absorbed and is reflected.

In the first phase of photosynthesis, cellular protein pigments called chloroplasts are excited by light that propels them into high-energy states. The chloroplasts then transfer this energy through electrons to other protein complexes (read: several proteins stuck together). This group of proteins is called the electron transport chain. The proteins operate similarly to a group of dominoes: after the first one has been pushed, each protein transfers energy to each member along down the line.

Effect of different colors of light on the rate of photosynthesisThe effect of different lights on plant growth: incandescent light, fluorescent light, sunlight and black light.

This re-emission of light energy is called florescence.
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  • Effect of different colors of light on the rate of photosynthesis.

    Chlorophyll absorbs red light. No light getsabsorbed by chlorophyll means the plant can't dophotosynthesis.

  • Investigate the effect of light on seed germination.

    The Effect of Far Infrared on the Growth of MoldIs plant growth affected by exposure to ultraviolet light?

  • Do plants grow better with sunlight or artificial light?

    Photosynthesis can be divided into two processes: the first requires light, and the second does not.

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Compare the affects of types of artificial light on plant growth.

Inside the plant Chlorophyll controls the amount of light the plant
absorbs, it does this with the aid of enzymes, it converts light
energy into chemical energy by a complex series of processes of
oxidation involving loss of electrons.

Chlorophyll a absorbs light with wavelengths of 430nm(

On the graph
there wasn't a point were the line started to straighten off, I would
assume that this would eventually happen as the plant can only absorb
so much light.

It reflects green light strongly so it appears

Photosynthesis is a reaction, which
needs energy from light to work, so as the amount of energy available
from light will rise with the light intensity intensity.

Can plants use sunlight to make oxygen?

White light is the best choice for photosynthesis efficiency in spinach, although different colors of light may affect different species of plants in various ways.

It is this part of the pigment that absorbs the energy from light.

Therefore it has the combined effect of both red and blue wavelengths, meaning it would photosynthesize most efficiently.
A practical application of the results of this experiment would be to consider the color of light when growing plants in a greenhouse, for example.

It absorbs light of 453nm and 642 nm maximally.

Data / Results
Table 2
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Graph 1
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Picture 2
Picture 3
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Picture 4
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Video 1
Discussion / Conclusion
Discussion / Conclusion
Discussion / Conclusion
Sources of Error
Sources of error could include the following:
Light leakage from opening of closet door
Error in concentration of baking soda solution
Possible different temperature of room on each day (experiment was done over a period of 3 days)
Spinach leaf chads were fresher on the first day than on the latter days
The lightbulb wattage could be inaccurate, depending on the age of the bulb and the amount of previous usage
An experiment was done to determine how the wavelength of light in a plant's environment affects how quickly it can photosynthesize.

It helps increase the range of light a plant can use for energy.

In the interest of genetic engineering and agricultural applications, the authors analyze the relative importance of genes that control both metabolic and light reactions as well as the structure, arrangement, and orientation of photosynthesis.

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