AGN 215 Soils Exam 1 questions and
answers already passed
Soil Fauna - correct answer ✔✔Macro and micro animals
Soil Flora - correct answer ✔✔Plant roots and microorganisms
What do roots provide? - correct answer ✔✔Physical support, air, water, temperature
regulation, nutrients
Humus (Hue-mus) - correct answer ✔✔Components of soil that are rich in organic matter
dirt - correct answer ✔✔simply soil out of place
soil - correct answer ✔✔material composed of minerals, gases, water, organic compounds, and
microorganisms
Hydrolysis - correct answer ✔✔Chemical Change
Water breaks down (connected on right side with a dot)
Acidification - correct answer ✔✔Chemical Change
Reaction of a mineral and an acid
Dissolution - correct answer ✔✔Chemical Change
Dissolving into ions
, Hydration - correct answer ✔✔Structural Change
Incorporation of water (water on both sides of equation)
Oxidation - correct answer ✔✔Structural change
gain or loss of an electron (oxygen combines on right side of equation)
Complexation - correct answer ✔✔Structural Change
dissolved by organic acid in water
Bulk Density Equation - correct answer ✔✔BD = (dry weight / volume)
average BD is 0.9------1.6
always less than PD
Particle Density Equation - correct answer ✔✔PD = (dry weight / soil solids volume)
always greater than BD
Pore Space Equation - correct answer ✔✔PS = (total volume) - (volume of solids)
% PS = (pore space volume) / (total sample volume) x 100
Pedology - correct answer ✔✔Study of soil genesis, development, and classification
Edaphology - correct answer ✔✔physical capability of plant growth
answers already passed
Soil Fauna - correct answer ✔✔Macro and micro animals
Soil Flora - correct answer ✔✔Plant roots and microorganisms
What do roots provide? - correct answer ✔✔Physical support, air, water, temperature
regulation, nutrients
Humus (Hue-mus) - correct answer ✔✔Components of soil that are rich in organic matter
dirt - correct answer ✔✔simply soil out of place
soil - correct answer ✔✔material composed of minerals, gases, water, organic compounds, and
microorganisms
Hydrolysis - correct answer ✔✔Chemical Change
Water breaks down (connected on right side with a dot)
Acidification - correct answer ✔✔Chemical Change
Reaction of a mineral and an acid
Dissolution - correct answer ✔✔Chemical Change
Dissolving into ions
, Hydration - correct answer ✔✔Structural Change
Incorporation of water (water on both sides of equation)
Oxidation - correct answer ✔✔Structural change
gain or loss of an electron (oxygen combines on right side of equation)
Complexation - correct answer ✔✔Structural Change
dissolved by organic acid in water
Bulk Density Equation - correct answer ✔✔BD = (dry weight / volume)
average BD is 0.9------1.6
always less than PD
Particle Density Equation - correct answer ✔✔PD = (dry weight / soil solids volume)
always greater than BD
Pore Space Equation - correct answer ✔✔PS = (total volume) - (volume of solids)
% PS = (pore space volume) / (total sample volume) x 100
Pedology - correct answer ✔✔Study of soil genesis, development, and classification
Edaphology - correct answer ✔✔physical capability of plant growth
