# Manganese, Copper, and Chromium on the Survival Rate of Moina

## School Name

Spring Valley High School

## Grade Level

11th Grade

## Presentation Topic

Environmental Science

## Presentation Type

Non-Mentored

## Abstract

The purpose of this project is to pinpoint the most dangerous pollutants found in freshwater ecosystems by comparing heavy metals and their toxicity towards water fleas. The project consisted of thirty samples of each heavy metal that were placed into ten ounce plastic cups for copper, chromium, and manganese. The samples contained one gram of each metal which was placed into every cup, as well as an initial ten Moina. Each trial was documented over a three day experimentation period. `The results did not support the hypothesis, as all of the Moina that were exposed to the copper concentrations died within the first twenty four hours. The sample mean of the Moina exposed to the concentration of manganese was 2.2, the median was 2, the minimum was 0, the maximum was 5, and the mode was 1. The sample mean of the Moina exposed to the concentration of chromium was 2.77, the median was 2.5, the minimum was 0, the maximum was 7, and the mode was 2. The sample mean of the control was 8.3, the median was 8, the minimum was 7, the maximum was 10, and the mode was 8. The inferential stats showed a significance in change to the Moina populations from day one to three among all of the trials.

## Recommended Citation

Horman, William, "Manganese, Copper, and Chromium on the Survival Rate of Moina" (2023). *South Carolina Junior Academy of Science*. 78.

https://scholarexchange.furman.edu/scjas/2023/all/78

## Location

BS 355

## Start Date

3-25-2023 10:45 AM

## Presentation Format

Oral and Written

## Group Project

No

Manganese, Copper, and Chromium on the Survival Rate of Moina

BS 355

The purpose of this project is to pinpoint the most dangerous pollutants found in freshwater ecosystems by comparing heavy metals and their toxicity towards water fleas. The project consisted of thirty samples of each heavy metal that were placed into ten ounce plastic cups for copper, chromium, and manganese. The samples contained one gram of each metal which was placed into every cup, as well as an initial ten Moina. Each trial was documented over a three day experimentation period. `The results did not support the hypothesis, as all of the Moina that were exposed to the copper concentrations died within the first twenty four hours. The sample mean of the Moina exposed to the concentration of manganese was 2.2, the median was 2, the minimum was 0, the maximum was 5, and the mode was 1. The sample mean of the Moina exposed to the concentration of chromium was 2.77, the median was 2.5, the minimum was 0, the maximum was 7, and the mode was 2. The sample mean of the control was 8.3, the median was 8, the minimum was 7, the maximum was 10, and the mode was 8. The inferential stats showed a significance in change to the Moina populations from day one to three among all of the trials.