Science

rock
natural,solid nonliving material made of one or more minerals.
mineral
natural material that forms from nonliving matter.
igneous rock
rock that forms when melted earth materials cool and harden.
sedimentary rock
rock that forms when small pieces of earth materials collect and become bound together.
metamorphic rock
rock that forms when existing rock is changed by heat and pressure.
soil
the part of the earth’s surface consisting of humus and weathered rock in which plants grow.
decay
to break down, or rot.
nutrient
things plants need in order to grow.
loam
soil that contains a mixture of humus and mineral materials of sand, silt, and clay.

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