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