loam		using something over and over
decompose		soil particles smaller than sand but bigger than clay
potassium		what lies below the subsoil
artesian well		element needed in making chlorophyll
bedrock		soil with clay, silt, sand, and humus
hypothesis		soil materials plants need
erosion		element that stimulates stem growth
weathering		element needed in fruit development
capillary action		recorded observations
quartz		living thing
recycling		group used for comparison
data		carrying away of the soil by water or wind
organism		sensible explanation
subsoil		surroundings of an organism
pedology		group with the variable
aquifer		test of a hypothesis
nutrients		self pumping well
constants		water moves upward through tiny spaces
neutral		soil science
experimental group		layer below the topsoil
experiment		rocks are broken down into soil
environment		upper level of the saturated layer
silt		most common mineral in the crust
topsoil		underground water
phosphorus		upper few inches of the soil
control group		scale for measuring how acidic or basic
water table		break down
ph		neither acid or base
nitrogen		conditions in both groups