For the past two weeks, the fifth and sixth grade students have been performing controlled experiments to determine how well different water filter materials will filter different types of contaminated water. Groups were given water contaminated with soil, tea, or cornstarch. The different filter materials they tested are screen, paper filters, sand and gravel, cotton balls, and cheese cloth. As the students tested the materials, they were recording their observations, and using three different criteria to determine the effectiveness of the materials. The criteria is clarity, amount of particles or sediment, and the time it takes to filter one quarter cup of water.
4 Comments
|
AuthorMrs. Houseman-STEM Specialist Archives
May 2015
Categories |