Minerals, A hard, nonliving material found in soil., Natural Resources, Something that comes from Earth that people use., Rock, A hard, nonliving part of Earth., Clay, A material from the Earth made of small particles of rock., Decomposition, The breaking down of dead plants and animal material., Humus, A material that is made up of broken-down parts of dead plants and animals., Particle, A tiny piece of something., Sand, Tiny pieces of rock or minerals found in soil or sand.

Chapter 2 Rocks

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