Unit: Soil, Water, and Erosion Using a Stream Table, by Ellen DeBacker

Topic

Hydrology

Brief description

This unit explores water, the water cycle, and the locations of water in a land profile as well as soil development and profiles, and the ways in which erosion and deposition impact the land surface. A stream table is used throughout through the unit to illustrate the various concepts.

Grade level

6 - 8 and 9 - 12

Outline of unit

Day Topic/Activity Key Concepts Materials & Resources Needed Field Science Possibilities
1

Show the Sweet Fresh Water video

Stages of river development, drainage basins, stream deposits, and stream life

Film    
2

Complete the video and hold a discussion

Stages of river development, drainage basins, stream deposits, and stream life

       
3

Draw the water cycle, introduce the stream table, review the beginning of the activity Stream table use for exploring water erosion and deposition.

Then do the subactivity Streams as part of the water cycle.

Water cycle, stages of river development, models (pictorial, physical, and technologic), stream table, deposition/erosion

Stream table, paper/colors

Make a field trip to the local stream

4

Notes of watersheds, demo on stream table. Do the subactivity Healthy watersheds demonstration.

Drainage basins, models, technology, stream table, human activity affects, and technology after fires

Stream table, sticks, netting, fake trees, and watershed background information

Look at maps of local area for the watershed(s) that supply the town water

5

Aquifer notes and demo, water tension lab. Do the subactivity Aquifer demonstration.

Aquifers, ground water, water tables, models, human activity affects, technology, and water surface tension

Aquifer background info, ground water model, cups, paper clips, tweezers, pennies, eye droppers

Investigate the source of water for wells in the local area

6

Soil, what's in it - a lab

Soil components, qualitative and quantitative lab, technology use – scopes and sifters

Garden soil sample, soil sifters, balances, paper plates, hand scopes

Use soil sample from school grounds or from students' homes

7

Soil types and textures – touch and feel exploration, soil triangle, use a TV scope to look at particles

Soil components, soil types, technology use (TV scope), data analysis, and qualitative lab

Soil triangle graph; clay, sand, loam mud samples to feel; soil type/texture background info; TV scope to magnify samples

Use soil samples from attendance area

8

Soil creation - mechanical and chemical weathering notes; Blanchard Spring Caverns film

Types of weathering, methods of weathering, photos/diagrams of caves, and life found in caves

Weathering background info, Blanchard Spring Caverns film or other cave film

   

 

9

Soil porosity lab

Quantitative lab, soil characteristics, water movement in soil, differences in soil types, misconceptions on porosity, data analysis

Soil samples, paper cups, graduated cylinders, water, stirring sticks

   

 

10

Soil profiles – tools and samples, notes on soil formation, soil profiles

Technology use – soil probes, soil profiles, soil formation, leaching, soil types/characteristics

Soil probes – core and screw type, soil formation and profile background info, application of profile data

Take probes into school yard to demonstrate use

11

Soil survey maps lab – day 1 of 2

Technology use – soil maps, human land use decisions, soil profiles, local application of info, land use

Soil survey aerial maps marked with soil types, soil type/profile data to go with maps

Use maps from local attendance area

12

Soil survey maps lab – day 2 of 2, lab observations – capillary movement and settling sediments

 

Capillary movement in soils, deposition of soil particles in water, comparison of soil types

Soil survey aerial maps marked with soil types, soil type/profile data to go with maps, jar with soil/water, 3 soil types in tubes, water source as base of tube

Use maps from local attendance area

13

Erosion and deposition lab – wind lab

Erosion and deposition, wind erosion effects, prevention of erosion, model and technology use – wind tunnels, human connection, historical connection, land use

Wind tunnels, soil, tray, hair dryer, pebbles, fence, wind erosion background info

Refer to local examples

14

Erosion and deposition lab – mass wasting. Review the beginning of the activity Stream table use for exploring water erosion and deposition.

Do the subactivity Mass wasting inquiry.

Erosion and deposition, mass wasting, prevention of erosion, technology use – stream table, slope and mass wasting, models – trays, comparison of soil types

Trays, dry and wet soil samples of 3 types, supports of different heights, stream table, mass wasting background info

Refer to local examples

15

Erosion and deposition lab – glaciation background, do the subactivity Glaciation.

Erosion and deposition, visual models, landforms resulting from glaciers

Pictures of glaciers and landforms resulting from glaciation, glacier background info, and terminology list

Refer to local examples

16

Erosion and deposition lab – glaciation, do the subactivity Glaciation in action.

Qualitative lab and technology use – physical stream table and models

Stream table, ice cubes, ice cubes with sand and pebbles enbedded, clay, cardboard base

   

17

Day 1, clean water lab: Design a filter to clean water

 

Inquiry and qualitative lab (design, run, analyze), technology/human effect interrelationship, team work, application of soil/water knowledge, models

Dirty water. Colanders. Filter supplies: Netting, cheesecloth, dry beans, dry rice, sand, cotton balls, screening, fish gravel, and fish charcoal (rinsed), etc.

Extension: Field trip to local water filtration plant

18

Day 2, clean water lab: Run lab and gather data

 

See above

Standards to compare cleaned water. Above materials

   
19

Day 3, clean water lab: Rerun lab, document, debrief

 

See above

Standards to compare cleaned water to, above materials

   
20

Soil, water, and erosion unit assessment

Application of knowledge, explanation of concepts

Copy of assessment