Go With the Flow

go with the flowThe Impact of Slope and Substrate on Water Flow Speed

by Catherine Wade and Will Federman

Water constantly cycles through the earth and the atmosphere. The study of water flow in streams and rivers and on impervious surfaces involves many variables. These include the slope or gradient of a stream, surface, or pipe and the type of substrate that water is flowing through. In this lab activity, students investigate how the speed of water flow changes with different slopes and different substrates.

Students learn: 1) How slope and substrate affect the speed of water flow, 2) How to ask questions, carry out an experiment and develop graphical hypotheses and 3) How to calculate speed and mathematical averages, and 4) How to plot line and bar graphs, and use data to explain results.

Docs: fulltext.docx   presentation.ppt   worksheet.docx
Keywords: argument, cause, data, erosion, HS-ESS2.C, explanations, graphs, hypothesis, investigations, math, models, questions, systems, water

The California Water Puzzle

the california water puzzleFreshwater Distribution Around California

by Tim Norris and Will Federman

Students research California’s fresh water supply and demand with sets of printed maps. They then solve the “California Freshwater Puzzle” based on their new knowledge of the geographies of freshwater supply (sources) and demand (uses) in California. This module is an opportunity for students to: learn how to read different kinds of maps, combine more than one source of information to make an analysis or an argument, learn about freshwater supply and demand in California, and solve the real-world problem of freshwater supply and demand in California.

Docs: fulltext.doc   prompt.docx   worksheet.docx   maps.pdf
Keywords: argument, HS-ESS3, evidence, mapping, water

Filtering out Pollution

filtering out pollutionLowering Turbidity to Increase Water Quality

by Tara Cornelisse and Ruben Mejia

In this lab activity, students learn what turbidity is and how to measure it using a turbidity sensor connected to a data logger. Students then use an array of readily available materials to investigate how to build a water filter that efficiently reduces turbidity.

Docs: fulltext.pdf
Keywords: build, data, HS-ESS3.A, HS-ESS3.C, HS-ETS1.C, HS-ETS2.B, explanations, investigations, HS-PS1.A, questions, turbidity, water, water filter, water quality