1 / 13

Teacher Information!

Teacher Information!. Necessary materials: PowerPoint Guide. Soil Formation. Pgs 46-50 in Ch.4 of Managing Our Natural Resources. Soil and Water Resources. Students will be able to…. Discuss how soil is formed. Describe weathering processes. Soil.

lauren
Download Presentation

Teacher Information!

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Teacher Information! • Necessary materials: • PowerPoint Guide

  2. Soil Formation Pgs 46-50 in Ch.4 of Managing Our Natural Resources Soil and Water Resources

  3. Students will be able to… • Discuss how soil is formed. • Describe weathering processes.

  4. Soil • Geologic definition: Loose surface of the earth as distinguished from solid bedrock (support of plant life not required). • Traditionaldefinition: Material which nourishes and supports growing plants (includes rocks, water, snow, air). • Organic + Inorganic material

  5. Soil • Mixture of inorganicmatter (mineral), organicmatter, water, and air. Air 25% Mineral Matter 45% Water 25% Organic Matter 5%

  6. % Soil components varies: • Type of vegetation • Amount of mechanical compaction • Amount of soil water present.

  7. Soil matters • Inorganicmatter • Rock slowly broken down into small particles • Organicmatter • Decaying plants and animals • Decomposers are vital! • Soil formation is slow!

  8. Parent material • Minerals • Examples? • Rocks • Aggregates of minerals • Three types • Igneous • Sedimentary • Metamorphic

  9. More parent material • Glacial deposits • Common in the Midwest U.S. • Loess deposits • Windblown silt • Eastern Mississippi Valley soils • Alluvial and marine deposits • Water-borne sediments • Organic deposits

  10. Weathering forces • Rocks & minerals break down  smaller pieces • Temperature changes • Water action • Plant roots • Ice expansion • Mechanical grinding

  11. OrganicMatter • Only about 5% of most soils • Small proportion but very important • WHY is organic matter important?

  12. OrganicMatter • Decayed plants and animals • Two types • Original tissue—still recognizable • Examples? • Humus—matter is too decomposed  unrecognizable • Examples? • WHAT causes decomposition?

  13. Review • Discuss how soil is formed. • Describe weathering processes.

More Related