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The effect of light on seed germinationWhat is Transpiration?

How does the type of light affect the number of leaf stomata?

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Effect of different colors of light on the rate of photosynthesis.

I will
do this by placing the Elodea in a test tube with sodium hydrogen
carbonate then I will vary the light (color) using colored
filters and count the number of oxygen bubbles given off using a
pencil dot technique.

Leaves appear green because they reflect green,while absorbing all other colors of light.

The occurrence of photosynthesis is very important to us as humans, because it provides us with the oxygen we need to breathe and plants are at the bottom of every food-chain and so without them, I would collapse....

Investigate the effect of light on seed germination.

What we perceive as white light is actually amixof all the colors in the rainbow.

Our results show that different color lights definitely does have a strong direct correlation with the rate of photosynthesis/growth of a plant.
LIGHT ABSORPTION IN PHOTOSYNTHESIS
Absorption spectra showing how the different side chains in chlorophyll a and chlorophyll b result in slightly different absorptions of visible light.

I think this because the plant may use up all of the carbon dioxide (Sodium hydro carbonate) and the plant can have as much light as it needs but if it does not have any carbon dioxide it will not be able to photosynthesise....

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

How does light intensity and duration affect the rate of photosynthesis?

When placed in sufficient light, the photosynthetic processes then produce oxygen bubbles that change the buoyancy of the disk, eventually causing them to rise.

The yellow, which yielded the highest results of all of the colors, was notably the brightest light of the four colored bulbs, even though each was marked as the same wattage.

Photosynthesis need light to work, so light therefore should speed up the rate of photosynthesis.
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  • So which colorsof light actually provide energy to the plant?

    A plant has a mixof different types of photopigments so that it canabsorb light at different colors.

  • Label cup with the color of light that will be tested.

    If there is only one color of light shining on aplant, then only a certain group of photopigmentsareactive.

  • The same cycle of the light reaction then takes place.

    Eventually the plant may die because of this lackof full spectrum light and certain processes nothappening.

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This is the closest LEDs can get to the spectrum of natural light.

The plant responded to the different colored light as follows: The rate of photosynthesis was the most successful in white light, and more successful in red and blue lighting, than in green and yellow lighting systems.

Color & Light Effects on Photosynthesis | Hunker

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 photosynthes...

The Effects of Different Light Colors on Photosynthetic Rate

Green or yellow light will have the slowest rates of photosynthesis because they are reflected by the pigments in the plant.
MATERIALS
PROCEDURE
PROCEDURAL FACTORS
INDEPENDENT VARIABLE
DEPENDENT VARIABLE
CONFOUNDING VARIABLES
CONTROL GROUP
REPLICATION
TABLE
GRAPH
DESCRIPTION & ANALYSIS
SOURCES OF ERROR AND IMPROVEMENTS
In this lab experiment, the team examines how the rate of photosynthesis is affected by different light colors in the leafs.

Effect of colour of light on the rate of photosynthesis

I will then use different
colored filters in front of the light to change the wavelength of the
light each time I change the filter I have to use the comparator to
set the light intensity back to 80mv as different filters let
different amounts of light though.

Affect of Different Colored Lights on Photosynthesis



* Light intensity - as if change it will effect the amount of light
being absorbed by the plant and therefore the amount of
photosynthesis the plant it able to do.

Effect of Different Colored Lights on Photosynthesis


HYPOTHESIS
If white light is a mixture of several wavelengths of colors and the chlorophyll in green leaves absorb energies from all visible light except green, then exposing white light to a green plants will result in the fastest rate of photosynthesis, followed by blue or red.

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