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How is Soil Formed?

Use your notes and pages 217-219 in your textbook to help you complete this crossword puzzle.
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Across
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Larger than clay, smaller than sand
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Soil layer containing the most humus
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Carry humus into the subsoil by eating their way through the soil
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Organisms that break down dead leaves into humus
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Soil layers that form slowly over time, with different colors, textures and composition
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Humus makes the soil rich in ______, which plants need to live.
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Humus creates spaces in the soil for air and ______.
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Formed from decayed remains of living things
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Crumbly, dark brown mixture of humus, clay and minerals
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Smallest of all soil particles
Down
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Loose material in which plants grow
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Plant structure that helps break down bedrock into small particles
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Larger than silt, smaller than gravel
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Soil layer closest to solid bedrock
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Type of surface that rainwater flows across without soaking into the ground
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Washes clay and other particles down to the B horizon
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Delicious spread made from chick-peas, not soil
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Also known as soil horizon B