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Alternate Light Rays on Micro-Organisms

CSEF · 2006 Microbiology

Steven D. Brewster · Ridgeview High School, Bakersfield

Overview

Objectives/Goals The purpose of this project was to determine if an alternate light source would yield a direct effect in the micro-organisms, Euglena and Pelomyxa Carolinensis. This was determined by exposing samples of the two to four different types of lights, Red, Blue, Green, and U.V. The samples were exposed in one hour intervals followed by a one hour observation period, the samples were observed using a stereoscope and a microscope. Their size, shape, and the total amount were recorded and used as data. The results of these exposures were surprisingly different from my original expectations. The two samples of Euglena exposed to the Red and Blue light sources increased by the tens of thousands; however the samples exposed to the U.V. light source diminished.

Summary statement

To determine whether or not alternate light rays will alter micro-organisms in any manner.

Help received

Advice given by Mrs. Stoebner, used lab equipment at Ridgeview High School

Competition history

  • CSEF 2006 Microbiology · Entry S1303

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