1) What is soil made of? a) Rocks and minerals b) Plastic c) Metal 2) Which process breaks rocks into soil? a) Weathering b) Melting c) Freezing 3) What is humus? a) Dead plants b) Sand c) Water 4) Which type of soil holds water well? a) Clay b) Sand c) Gravel 5) What causes weathering? a) Wind and water b) Fire c) Plastic 6) Which soil is best for plants? a) Loam b) Clay c) Gravel 7) What is erosion? a) Soil movement b) Soil creation c) Soil hardening 8) Which soil feels gritty? a) Sand b) Clay c) Loam 9) What is the top layer of soil called? a) Topsoil b) Bedrock c) Subsoil 10) Which is not a type of weathering? a) wind b) Rain c) Humus

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