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Earth's Resources: 

Saving Our Soil

Soil is a mixture of clay, silt, and sand.
Clay

  • Smallest particles

  • Small pores

  • Sticky when wet

  • Hard when dry

 

By Krish Dulal (Own work) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons

Silt

  • Medium particles

  • Medium pores

  • Very light

  • Feels gritty

Kate Jewell [CC BY-SA 2.0 (http://creativecommons.org/licenses/by-sa/2.0)], via Wikimedia Commons

Sand

  • Big particles

  • Big pores

  • Feels rough

  • Doesn't hold nutrients or water

  • Crumbly

By Manfred Morgner (ka-em-zwei-ein) [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/)], via Wikimedia Commons

Particle - a very small part of something

EXAMPLES

Salt
Dust

By Christian Mertes (Mudd1 12:26, 18 April 2007 (UTC)) (Own work) [GFDL (http://www.gnu.org/copyleft/fdl.html), CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/) or CC BY-SA 2.5-2.0-1.0 (http://creativecommons.org/licenses/by-sa/2.5-2.0-1.0)], via Wikimedia Commons

 

 

 

 

 

 

 

 

 

Dusty Surface Texture from http://www.photos-public-domain.com/2012/02/20/dusty-surface-texture/

 

 

 

 

 

 

 

 

 

Coarse Sand Gravel from http://www.photos-public-domain.com/2011/01/26/coarse-sand-gravel-texture/

Sand

Levels of Soil

References

Discovery Education. (2015). "The dirt on soil." Classroom Resources: Learning Adventures. Retrieved on 12/20/15    

       from http://school.discoveryeducation.com/schooladventures/soil/name_soil.html

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