Memory Mixtures and Soil MemoryVersion en ligne Match the vocabulary word to the definition. par Michael Porter topsoil soil sand A mixture of water, air, tiny pieces of rock, and humus humus decay weathering mixture a combination of two or more different substances that keep their identities The upper layer of soil in which plants have most of their roots Particles of rock that are smaller than sand but larger than clay To be slowly broken down by the natural processes that destroy a plant or body The largest particles of rock that make up soil the remains of decayed plants or animals in the soil A characteristic of matter that you can observe or measure directly The smallest particles of rock that make up soil physical property silt clay The breaking down of rocks on Earth’s surface into smaller pieces
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