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  • A type of chemical weathering
    Hydrolysis
  • Ideal soil has 20 % air
    false
  • Breakdown of rocks by chemical alsteration
    chemical weathering
  • Ideal soil water % is 25%
    True
  • It is made up of air, water, minerals and organic matter.
    Soil
  • Which layer is the hardest layer.
    subsoil
    Topsoil
    Bedrock
  • Type of mechanical weathering
    Freeze Thaw
  • 25% is _________
    Air
  • Breakdown of rocks by living organisms
    Biological weathering
  • The total volume of soil occupied by soil pores
    Porosity
  • It has many minerals in this layer of soil.
    Subsoil
  • Can animals live in the soil?
    Yes
  • minerals __________.
    45%
  • ______ is 25%
    Water
  • Water and soil total ideal % is 50%
    True
  • ideal mineral matter %
    45%
  • Definition for porosity
    The total volume of soil occupied by soil pores
  • Horizons
    Name for the layers of soil
  • Ideal organic matter %
    5%
  • Can plants live without the water in the soil?
    No
  • Physical breakdown of rock to smaller fragments without chemical change
    Mechanical weathering
  • Which soil layers where plants have their roots?
    Topsoil
  • organic matter is _________.
    5%
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