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FOSS Earth Science 4th Grade

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  • Plants grow in the topsoil. What is the best soil for growing plants?
    loam
  • How do worms help us? They eat ________ and create tunnels mixing up the _________. This helps plants grow by creating ___________ rich soil.
    Soil, Soil, nutrient
  • What is loamy soil?
    The best type for plants. A mix of sand, silt, clay and humus
  • Soil is made of ________, ________, _________, & ____________. These are earth materials.
    Rocks, decayed plants, air, & water
  • Which soil is this? It has the smallest particles and feels sticky when wet, and hard when dry.
    Clay
  • Put us in order from largest to smallest: Pebble, silt, clay, gravel, sand
    Pebble, gravel, sand, silt, clay
  • What type of soil is this? It has medium particles, retains more water, and sticks to your feet.
    Silt
  • Which type of soil is this? It is rough and gritty.
    Sand
  • This is __________. It is made of decaying plants and animals.
    humus