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

Land to Sea

land to seaSearching for the Source of Pollutants

by Max Tarjan and Will Federman

In this module students work in small groups with map-based data to learn about watersheds and to find a likely source of pollutants. After a short introduction, students work together to intrepret ther maps provided and to support an argument, stating where the pollutant is coming from, using the map data as evidence. The module provides all the supporting materials needed to run a 90 minute activity.

In this module, students learn: 1) How substances and organisms on land can affect ocean life, 2) How human activities may disrupt ecosystem integrity, to identify the watershed that supplies a river, 3) How to interpret maps of watersheds and land use, and 4) How to combine information from different maps using map scales, and 5) How to make estimates based on map data, and engage in argument from evidence.

Docs: fulltext.pdf   introlect.pdf   summarylect.pdf   handout.pdf   watersheds.pdf   landuse.pdf   seaotters.pdf   sealions.pdf
Keywords: argument, cause, communication, data, HS-ESS2.C, evidence, explanations, HS-LS2.A, HS-LS2.C, mapping, marine mammals, models, patterns, pollution, scale, systems, watersheds

There’s Something in the Water

there's something in the waterInvestigating Water Quality in Local Watersheds

by Yiwei Wang and Dan Johnston

This module teaches students about why watersheds are important
components of the ecosystem and how their health can be impacted by human activities. The objectives are to get students to learn what man-made pollutants are entering their local watersheds, predict which water bodies are most impacted by these contaminants, and test their ideas by using kits to measure water quality. Students will learn how jeopardizing the integrity of the watershed impacts both human health and that of the ecosystem and consider potential ways to mitigate these effects.

Docs: fulltext.pdf   final.doc   handout.doc   handoutkey.doc
Keywords: data, ecosystem health, HS-ESS2.C, HS-ESS3.A, explanations, investigations, HS-LS2.C, models, pollution, water quality, watersheds