SCSC 301 QUESTIONS AND ANSWERS
Which9horizon9is9not9part9of9the9soil9solum?9-9ans--C
Organic9matter9in9soil9typically9accounts9for9____%9or9less9of9the9soils9total9volume.9-
9ans--5%
Pore9space9in9soil9may9contain9either9_____9or9_____9-9ans--Air
Water
Soils9are9the9result9of9______9and9biota9acting9on9parent9material9over9time9as9modified9
by9______9-9ans--Climate
Topography
Though9plants9depend9on9soil9for9growth,9which9of9the9items9below9is9found9in9soil,9but9n
ot9required9for9plant9growth?9-9ans--Carbon9dioxide
Soil9profile9-9ans--Contains959master9horizons9potentially9founding9a9soil
A->E->B->C
Which9soil9forming9factor9can9be9transported9before9it9affects9soil9formation?9-9ans--
Parent9material
Which9of9the9following9describes9a9composite9sample?9-9ans--
109samples9of9soil9were9collected9across9a9field,9mixed9together,9then9used9as9the9final9s
ingle9soil9sample9representing9the9field9submitted9for9analysis
Which9horizon9is9most9affected9by9the9soil9forming9factors?9-9ans--A
Which9of9the9following9are9soil9forming9factors?9-9ans--Time
Parent9material
Topography
Biota
Climate
Compare9a9humid9tropical9rainforest9to9a9cool9and9dry9mountain9plain9and9elect9the9most
9correct9answer.9-9ans--
, The9humid9tropical9rainforest9will9weather9faster9and9the9soil9will9develop9more9rapidly9du
e9to9intense9weathering9climate
Soil9that9forms9in9place9is9called9_____?9-9ans--Residual
Soils9that9have9parent9materials9affected9by9the9movement9of9water9include9_____9soils,9
which9are9formed9from9deposition9of9sediments9from9streams9and9rivers9into9deltas9and9f
loodplains,9and9_____9soils,9which9are9formed9from9deposition9of9sediment9by9lakes.9-
9ans--Alluvial
Lacustrine
A9mineral,9such9as9quartz,9that9has9not9been9altered9since9its9formation9from9magma9is9a
9_____9mineral.9-9ans--Primary
Which9of9the9following9are9primary9minerals?9-9ans--Mica
Quartz
Olivine
Hornblende
Feldspar
As9a9primary9mineral9weather9to9form9secondary9minerals,9elements9can9sometimes9be9l
ost.9Which9of9the9following9are9most9likely9to9be9lost9to9leaching?9-9ans--Calcium9(Ca)
Potassium9(K)
Sodium9(Na)
Soil9organic9matter9forms9from9the9decomposition9of9_____9-9ans--Animal9residue
Manure
Microorganism9residue
Plant9residue
By9volume,9soil9is9made9up9of9which9of9the9following?9-9ans--Mineral9matter
Air9
Water
Organic9matter
Organic9matter9is9made9of9carbon9compounds.9When9it9decomposes,9what9gas9forms?9-
9ans--Carbon9dioxide9(C02)
Another9word9for9soil9organic9matter9is9_____9-9ans--Humus
The9color9of9soil9organic9matter9is9____,9which9also9influences9the9color9of9surface9soils.9
-9ans--Dark9brown9to9black
Which9primary9mineral9is9relatively9resistant9to9weathering9and9does9not9weather9into9an
other9mineral?9-9ans--Quartz
Which9horizon9is9not9part9of9the9soil9solum?9-9ans--C
Organic9matter9in9soil9typically9accounts9for9____%9or9less9of9the9soils9total9volume.9-
9ans--5%
Pore9space9in9soil9may9contain9either9_____9or9_____9-9ans--Air
Water
Soils9are9the9result9of9______9and9biota9acting9on9parent9material9over9time9as9modified9
by9______9-9ans--Climate
Topography
Though9plants9depend9on9soil9for9growth,9which9of9the9items9below9is9found9in9soil,9but9n
ot9required9for9plant9growth?9-9ans--Carbon9dioxide
Soil9profile9-9ans--Contains959master9horizons9potentially9founding9a9soil
A->E->B->C
Which9soil9forming9factor9can9be9transported9before9it9affects9soil9formation?9-9ans--
Parent9material
Which9of9the9following9describes9a9composite9sample?9-9ans--
109samples9of9soil9were9collected9across9a9field,9mixed9together,9then9used9as9the9final9s
ingle9soil9sample9representing9the9field9submitted9for9analysis
Which9horizon9is9most9affected9by9the9soil9forming9factors?9-9ans--A
Which9of9the9following9are9soil9forming9factors?9-9ans--Time
Parent9material
Topography
Biota
Climate
Compare9a9humid9tropical9rainforest9to9a9cool9and9dry9mountain9plain9and9elect9the9most
9correct9answer.9-9ans--
, The9humid9tropical9rainforest9will9weather9faster9and9the9soil9will9develop9more9rapidly9du
e9to9intense9weathering9climate
Soil9that9forms9in9place9is9called9_____?9-9ans--Residual
Soils9that9have9parent9materials9affected9by9the9movement9of9water9include9_____9soils,9
which9are9formed9from9deposition9of9sediments9from9streams9and9rivers9into9deltas9and9f
loodplains,9and9_____9soils,9which9are9formed9from9deposition9of9sediment9by9lakes.9-
9ans--Alluvial
Lacustrine
A9mineral,9such9as9quartz,9that9has9not9been9altered9since9its9formation9from9magma9is9a
9_____9mineral.9-9ans--Primary
Which9of9the9following9are9primary9minerals?9-9ans--Mica
Quartz
Olivine
Hornblende
Feldspar
As9a9primary9mineral9weather9to9form9secondary9minerals,9elements9can9sometimes9be9l
ost.9Which9of9the9following9are9most9likely9to9be9lost9to9leaching?9-9ans--Calcium9(Ca)
Potassium9(K)
Sodium9(Na)
Soil9organic9matter9forms9from9the9decomposition9of9_____9-9ans--Animal9residue
Manure
Microorganism9residue
Plant9residue
By9volume,9soil9is9made9up9of9which9of9the9following?9-9ans--Mineral9matter
Air9
Water
Organic9matter
Organic9matter9is9made9of9carbon9compounds.9When9it9decomposes,9what9gas9forms?9-
9ans--Carbon9dioxide9(C02)
Another9word9for9soil9organic9matter9is9_____9-9ans--Humus
The9color9of9soil9organic9matter9is9____,9which9also9influences9the9color9of9surface9soils.9
-9ans--Dark9brown9to9black
Which9primary9mineral9is9relatively9resistant9to9weathering9and9does9not9weather9into9an
other9mineral?9-9ans--Quartz
