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NSS3 - Unit 9 - Soil layers

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  • What is soil made of?
    Rocks, minerals, air, water and humus
  • In which soil layer there are lots of humus?
    Topsoil
  • What is the third soil layer?
    Bedrock
  • What is the second soil layer?
    Subsoil
  • In which soil layer there is very little humus and some small rocks?
    Subsoil
  • In which soil layer there are roots, insects and other tiny living things?
    In the topsoil
  • What is the first soil layer?
    Topsoil
  • What turns dead plants and animals into humus?
    Decomposers
  • Which soil layer has very little water and air?
    Bedrock
  • What is humus?
    It is the remains of dead animals
  • Which is the most productive layer of the soil?
    Topsoil
  • Which soil layer is very hard and made of very big rocks?
    Bedrock
  • How many layers of soil are there?
    3!
  • What colors can soil be?
    Brown, dark brown, red, black etc
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