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