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9 terms

SJ - Chp 7 Rocks & Soil Vocabulary

SJ - Science Chp 7 Rocks & Soil Vocabulary
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rock
natural, solid, non-living material made of one or more minerals
mineral
natural material that forms from non-living matter
soil
the part of Earth's surface consisting of humus and weathered rock in which plants grow
nutrient
thing plants need in order to grow
igneous rock
rock that forms when melted earth materials cool and harden
metamorphic rock
rock that forms when existing rock is changed by heat and pressure
sedimentary rock
rock that forms when small pieces of earth materials collect and become bound together
decay
to break down, or rot
loam
soil that contains a mixture of humus and mineral materials of sand, silt, and clay