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The author planned and designed an experiment to compare the rate of …


Biology Articles » Methods & Techniques » Comparing the rate of photosynthesis with different wavelengths of light

Background
- Comparing the rate of photosynthesis with different wavelengths of light

Comparing the rate of photosynthesis with different wavelengths of light

By Juvelle Taylor

Article submitted on October 17, 2008. Published by Biology-Online.org.

Background

Planning and Designing

CO2 can be bubbled into bromothymol blue to give a yellow colour. If an Elodea plant is placed in the solution, the time taken for the solution to change back to blue will be equal to the rate at which the plant uses CO2 in photosynthesis. Plan and design an experiment to compare the rate of photosynthesis with the different wavelengths of light.

Hypothesis:  With a blue filter the photosynthetic rate will be the highest, as blue is a highly absorbent color; it also has a short wavelength so carries the most energy. The color to have the least photosynthetic rate will be green as although it has quite a short wavelength a lot of energy will be reflected by the plant and not absorbed.

Independent Variable: light wavelength

Dependent Variable: the no. of oxygen bubbles given off per minute

Aim:  To compare the rate of photosynthesis with different wavelengths of light.

rating: 3.00 from 8 votes | updated on: 30 Oct 2008 | views: 9549 |

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