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Effects of different colors of light on plant growth.

Count bubbles of oxygen gas given off by elodea to determine the rate of photosynthesis.4.

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The effect of light on seed germinationWhat is Transpiration?

The chemical equation of photosynthesis is: [IMAGE]6CO2 + 6H20 C6 H12 O6 + 6O2 it has been proven many times that plants need light to be able to photosynthesize , so you can say that without light the plant would neither photosynthesize or survive....

In practice, any one of these factors could limit the rate of photosynthesis.

Considering that not all light energy is used for photosynthesis we propose an alternative hypothesis. In a previous experiment the pigment xanthophylls absorbed significant amounts of blue light. In new research it is found that this pigment could be an important component in a process called energy dissipation rather than photosynthesis. In order to not overwhelm the plant with photosynthesis and respiration, this photon energy goes to other functions or formations of the plant. Further research on the function of xanthophylls will need to be conducted in order to understand the processes of plant function.

This means that the light is limiting the rate of photosynthesis.

Aim: We will be trying to see if light intensity has an effect on the rate of photosynthsis.

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.

Variables: The variables that might affect the rate of photosynthesis in this experiment are: Temperature: When the temperature rises so does the rate of photosynthesis; this is because as the temperature around the plant rises the enzymes controlling photosynthesis inside the chloroplasts heat up and start moving around faster, the fast moving molecules collide with other fast moving enzymes causing them to react....

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

[IMAGE] 1) Here as the light intensity increases so does the rate of photosynthesis.

However, in order to make an accurate conclusion and experiment, the team decided to take the ET50 of the trials, which is the time at which 50% of the leaves have floated up.

Light is a very important factor in the rate of photosynthesis, in my project I am going to test that plants do need light in order to photosynthesise.

How does this investigation demonstrate that plants give off oxygen during  photosynthesis?
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  • Effects of different colors of light on the photosynthesis rate.

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

  • Time (min.) Rate of Photosynthesis

    In this experiment I will investigate how sodium hydrogen carbonate affects the rate of photosynthesis.

  • what factors affect the rate of photosynthesis?

    There will be a maximum level of photosynthesis during the experiment it is called a limiting factor.

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how does light intensity affect the rate of photosynthesis?

If I were to conduct this experiment again, the following factors would be changed:
Room Temperature
Time of year when experiment is conducted
extend experiment time frame to twenty- four hours
After these changes are made I believe that the experiment will be accurate.

how does temperature affect the rate of photosynthesis?

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.

Free rate of photosynthesis Essays and Papers - …

Clearly you could measure the distance of your sample from the lamp and from a knowledge of the Inverse Square Law calculate the reduction in light intensity in moving your sample from (say) 40 cm to (say) 80 cm.

Free rate of photosynthesis papers, essays, and research papers.




Plan

I will vary the distance of the lamp to the beaker which will help me
to measure the light intensity using the equation: E=1/d2.

The Effect of Light Intensity on the Rate of Photosynthesis

Light Intensity

One of the variables commonly investigated in photosynthesis experiments is to measure the effect of light intensity on the rate.

Effects Light has on the rate of Photosynthesis ..

This means the rate
of photosynthesis is halved but we are measuring the light intensity
and so this will not mean the rate of photosynthesis is halved.

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