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Soil

Published on Nov 19, 2015

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PRESENTATION OUTLINE

Soil

It's almost everywhere!
Photo by chrissam42

Soil is made of 4 elements

  • bits of rock
  • humus
  • air
  • water
Photo by USDAgov

rock

Rocks are broken down into little bits by wind and water.
Photo by wili_hybrid

humus

tiny pieces of dead plants and animals
Photo by bill barber

air

little pockets of air help plants grow
Photo by hdurnin

water

water is underground too
Photo by Pro-Zak

Without soil plants and animals could not live!

Photo by Ric e Ette

Soil cannot be formed on steep mountainsides.

Photo by GerryT

Rushing water makes it hard for soil to form too.

Photo by VinothChandar

It can take 100 years to from one inch of soil!

Photo by Miguel Vera