|
Earthworks
Earth System Science for Secondary Teachers
Water Quality Comparison of Pulpit Rock Stream and Welton Falls
Grade Level: 8 th Earth Science
Time: Intro to water quality tests and in class testing will be done over a 3-week period. Students will conduct Ph, Alkalinity, Dissolved Oxygen (D.O.) and Biochemical Oxygen Demand (B.O.D.) tests. We will focus on testing techniques, good sampling procedures, and importance of consistency. Students will first test water from school bubblers and compare the quality to their home water supply.
Objectives:
- When given different water samples the students will be able to perform water quality tests, create graphs/data charts displaying information, analyze data and create comparisons/predictions as to how the samples differ and potential reasons why.
- Given sample sites the students will be able to perform water quality tests. Students should develop the plan outlining test sites, testing techniques, and data collection strategies.
Procedures:
Week One: Introduce water quality tests and what the tests are telling us about the water samples. Practice using the Hach water test kits and collecting data, focusing on tests, testing, and good testing strategies.
Week Two: Students will now compare school water to home supply. Focus on good techniques and consistency of methods. Create data charts and make comparisons of two samples. Will complete charts, graphs, and written comparisons.
Week Three: Students will complete field tests while on Mt. Cardigan trip. Comparing water quality of Pulpit Rock stream and Welton Falls . Students will work in groups of 3-4 and all use Hach water test kits.
Assessment: Will include complete water assessment including all field notes retyped, data charts, and graphs of water quality, written comparison of test sites, and sources of error. Each student will complete portfolio for Cardigan experience, this is final assessment.
Enrichment: To enhance this project. Some students will opt to use GPS to plot all testing sites and map stream flow. The Vernier test kit will also be available for those who choose to compare the Hach water test kits with results from the Vernier Probes. Additional test sites will also be available for those students who are interested in testing more areas and comparing additional data.
Resources: Students will be using test kits provided: Hach water test kit and the Vernier test kits (probes). GPS will be available as well as the mapping software. Parents are chaperones on this trip and act as support during our activities. Administration has always been very supportive and ensures that all materials/software, are always available.
Barriers: weather in always a factor for fieldwork, so we must ensure that all students have quality raingear/boots for our weeklong trip.
*Stream flow also plays a role in this comparison and is covered during the math block. The data is later added to our water study.
|
About Us