NLN PAX SCIENCE PRACTICE TESTS
QUESTIONS AND CORRECT ANSWERS
AA2personA2blowsA2hisA2breathA2intoA2aA2strawA2thatA2isA2placedA2inA2limewater.A2TheA2lim
ewaterA2becomesA2cloudyA2becauseA2theA2person'sA2breathA2contains:A2-A2Ans--
carbonA2dioxide
AA2personA2whoA2wasA2inA2anA2autoA2accidentA2hasA2formedA2aA2bloodA2clotA2atA2theA2site
A2ofA2theA2injury.A2OneA2eventA2thatA2canA2leadA2toA2formationA2ofA2aA2bloodA2clotA2isA2that:
A2-A2Ans--rupturedA2plateletsA2releaseA2thromboplastin
AA2studentA2focusesA2sunlightA2toA2aA2pointA2withA2aA2thinA2convergingA2(convex)A2lens.A2
WhichA2ofA2theseA2directA2measurementsA2canA2theA2studentA2makeA2asA2aA2resultA2ofA2th
isA2experiment?A2-A2Ans--theA2approximateA2focalA2lengthA2ofA2theA2lens
InA2ecologicalA2succession,A2theA2firstA2livingA2thingA2toA2colonizeA2aA2hithertoA2barrenA2ar
eaA2isA2calledA2a:A2-A2Ans--pioneerA2organism
UnicellularA2organismsA2thatA2haveA2aA2nucleusA2andA2canA2swimA2withA2theA2aidA2ofA2cili
aA2areA2examplesA2of:A2-A2Ans--protozoans
WhichA2ofA2theseA2conditionsA2isA2associatedA2withA2smoking?A2-A2Ans--emphysema
WhichA2ofA2theseA2quantitiesA2isA2mostA2closelyA2associatedA2withA2anA2object'sA2inertia?
A2-A2Ans--Mass
WhichA2ofA2theseA2sequencesA2ofA2anatomicA2organization,A2fromA2theA2simplestA2levelA2t
oA2theA2mostA2complex,A2isA2theA2correctA2sequence?A2-A2Ans--
FromA2tissue,A2organ,A2organA2systemA2toA2organism
WhichA2partA2ofA2theA2cellA2structureA2controlsA2theA2passageA2ofA2materialsA2intoA2andA2o
utA2ofA2theA2cell?A2-A2Ans--PlasmaA2membrane
WhileA2workingA2inA2theA2chemistryA2laboratory,A2aA2studentA2spillsA2diluteA2hydrochloricA2
acidA2onA2herA2hand.A2WhatA2isA2theA2firstA2actionA2thisA2studentA2shouldA2take?A2-A2Ans--
FlushA2herA2handA2withA2largeA2quantitiesA2ofA2water
WithinA2aA2livingA2cell,A2theA2oxygenA2(O2)A2fromA2aA2mixtureA2ofA2O2A2andA2carbonA2dioxi
deA2(CO2)A2isA2usedA2up.A2ThisA2createsA2aA2concentrationA2gradientA2acrossA2theA2cellA2
membrane,A2drawingA2O2A2acrossA2theA2membraneA2fromA2theA2outsideA2in,A2aA2processA
2knownA2asA2-A2Ans--Diffusion
, YouA2cutA2yourA2fingerA2ratherA2deeplyA2whileA2slicingA2anA2apple.A2WhichA2ofA2theseA2acti
onsA2shouldA2youA2takeA2first?A2-A2Ans--
WashA2theA2woundA2continuouslyA2withA2coldA2runningA2water
30A2studentsA2inA2aA2classA2carefullyA2measureA2theA2lengthA2andA2widthA2ofA220A2peanutA
2shells.A2TheyA2alsoA2countA2theA2numberA2andA2noteA2theA2sizeA2ofA2theA2peanutsA2inside
.A2ThisA2informationA2isA2recordedA2onA2variousA2graphsA2showingA2theA2numbersA2ofA2nut
sA2andA2theA2differentA2sizes.A2TheA2collectedA2evidenceA2ofA2theA2peanutsA2givesA2theA2st
udentsA2anA2ideaA2ofA2theA2extentA2of:A2-A2Ans--variationA2withinA2aA2species
AA2*tincture*A2isA2aA2solutionA2inA2which:A2-A2Ans--alcoholA2isA2theA2solvent
AllA2theA2glucoseA2filteredA2fromA2theA2bloodA2inA2theA2glomerulusA2intoA2theA2Bowman'sA2
capsuleA2ofA2theA2kidneyA2nephronA2isA2returnedA2toA2theA2tissueA2fluidA2whileA2passingA2a
longA2theA2proximalA2tubule.A2ThisA2rapidA2returnA2isA2effectedA2byA2theA2processA2of:A2-
A2Ans--activeA2transport
IfA2theA2nightA2temperatureA2dropsA250A2degrees,A2theA2roadrunner'sA2internalA2energy-
conservationA2permitsA2aA2loweringA2ofA2bodyA2temperatureA2to:A2-A2Ans--94°F
1A2kilogramA2(kg)A2ofA2solidA2XA2atA210CA2andA21A2kgA2ofA2solidA2YA210CA2eachA2absorbA25
A2joulesA2ofA2heatA2energy.A2TheA2finalA2temperaturesA2onA2XA2andA2YA2isA215CA2andA220
C,A2respectively.A2ComparedA2toA2X,A2YA2mustA2haveA2aA2lower:FA2-A2Ans--specificA2heat
AA2womanA2suddenlyA2chokesA2onA2aA2pieceA2ofA2foodA2andA2clutchesA2franticallyA2atA2he
rA2throat.A2AnA2immediateA2remedyA2isA2to:A2-A2Ans--
applyA2quick,A2hardA2pressuresA2successivelyA2toA2herA2abdomen,A2justA2belowA2herA2dia
phragm
AnA2unknownA2gasA2isA2moreA2denseA2thanA2air,A2doesA2notA2supportA2combustion,A2andA
2turnsA2aA2limewaterA2solutionA2cloudy.A2ThisA2gasA2isA2mostA2probably:A2-A2Ans--
carbonA2dioxide
NightA2blindnessA2inA2humansA2isA2causedA2byA2aA2lackA2of:A2-A2Ans--VitaminA2A
InA2varietiesA2ofA2matter,A2theA2termA2heterogeneousA2mayA2beA2appliedA2to:A2-A2Ans--
mixtures,A2butA2notA2elementsA2orA2compounds
TheA2atomsA2ofA2anA2elementA2withA2sevenA2valenceA2electronsA2areA2mostA2probablyA2cl
assifiedA2as:A2-A2Ans--nonmetals
TheA2inheritedA2factorsA2thatA2areA2transmittedA2inA2aA2organismA2fromA2generationA2toA2g
enerationA2areA2calledA2its:A2-A2Ans--genotype
WhichA2ofA2theseA2conditionsA2isA2associatedA2withA2smoking?A2-A2Ans--Emphysema
QUESTIONS AND CORRECT ANSWERS
AA2personA2blowsA2hisA2breathA2intoA2aA2strawA2thatA2isA2placedA2inA2limewater.A2TheA2lim
ewaterA2becomesA2cloudyA2becauseA2theA2person'sA2breathA2contains:A2-A2Ans--
carbonA2dioxide
AA2personA2whoA2wasA2inA2anA2autoA2accidentA2hasA2formedA2aA2bloodA2clotA2atA2theA2site
A2ofA2theA2injury.A2OneA2eventA2thatA2canA2leadA2toA2formationA2ofA2aA2bloodA2clotA2isA2that:
A2-A2Ans--rupturedA2plateletsA2releaseA2thromboplastin
AA2studentA2focusesA2sunlightA2toA2aA2pointA2withA2aA2thinA2convergingA2(convex)A2lens.A2
WhichA2ofA2theseA2directA2measurementsA2canA2theA2studentA2makeA2asA2aA2resultA2ofA2th
isA2experiment?A2-A2Ans--theA2approximateA2focalA2lengthA2ofA2theA2lens
InA2ecologicalA2succession,A2theA2firstA2livingA2thingA2toA2colonizeA2aA2hithertoA2barrenA2ar
eaA2isA2calledA2a:A2-A2Ans--pioneerA2organism
UnicellularA2organismsA2thatA2haveA2aA2nucleusA2andA2canA2swimA2withA2theA2aidA2ofA2cili
aA2areA2examplesA2of:A2-A2Ans--protozoans
WhichA2ofA2theseA2conditionsA2isA2associatedA2withA2smoking?A2-A2Ans--emphysema
WhichA2ofA2theseA2quantitiesA2isA2mostA2closelyA2associatedA2withA2anA2object'sA2inertia?
A2-A2Ans--Mass
WhichA2ofA2theseA2sequencesA2ofA2anatomicA2organization,A2fromA2theA2simplestA2levelA2t
oA2theA2mostA2complex,A2isA2theA2correctA2sequence?A2-A2Ans--
FromA2tissue,A2organ,A2organA2systemA2toA2organism
WhichA2partA2ofA2theA2cellA2structureA2controlsA2theA2passageA2ofA2materialsA2intoA2andA2o
utA2ofA2theA2cell?A2-A2Ans--PlasmaA2membrane
WhileA2workingA2inA2theA2chemistryA2laboratory,A2aA2studentA2spillsA2diluteA2hydrochloricA2
acidA2onA2herA2hand.A2WhatA2isA2theA2firstA2actionA2thisA2studentA2shouldA2take?A2-A2Ans--
FlushA2herA2handA2withA2largeA2quantitiesA2ofA2water
WithinA2aA2livingA2cell,A2theA2oxygenA2(O2)A2fromA2aA2mixtureA2ofA2O2A2andA2carbonA2dioxi
deA2(CO2)A2isA2usedA2up.A2ThisA2createsA2aA2concentrationA2gradientA2acrossA2theA2cellA2
membrane,A2drawingA2O2A2acrossA2theA2membraneA2fromA2theA2outsideA2in,A2aA2processA
2knownA2asA2-A2Ans--Diffusion
, YouA2cutA2yourA2fingerA2ratherA2deeplyA2whileA2slicingA2anA2apple.A2WhichA2ofA2theseA2acti
onsA2shouldA2youA2takeA2first?A2-A2Ans--
WashA2theA2woundA2continuouslyA2withA2coldA2runningA2water
30A2studentsA2inA2aA2classA2carefullyA2measureA2theA2lengthA2andA2widthA2ofA220A2peanutA
2shells.A2TheyA2alsoA2countA2theA2numberA2andA2noteA2theA2sizeA2ofA2theA2peanutsA2inside
.A2ThisA2informationA2isA2recordedA2onA2variousA2graphsA2showingA2theA2numbersA2ofA2nut
sA2andA2theA2differentA2sizes.A2TheA2collectedA2evidenceA2ofA2theA2peanutsA2givesA2theA2st
udentsA2anA2ideaA2ofA2theA2extentA2of:A2-A2Ans--variationA2withinA2aA2species
AA2*tincture*A2isA2aA2solutionA2inA2which:A2-A2Ans--alcoholA2isA2theA2solvent
AllA2theA2glucoseA2filteredA2fromA2theA2bloodA2inA2theA2glomerulusA2intoA2theA2Bowman'sA2
capsuleA2ofA2theA2kidneyA2nephronA2isA2returnedA2toA2theA2tissueA2fluidA2whileA2passingA2a
longA2theA2proximalA2tubule.A2ThisA2rapidA2returnA2isA2effectedA2byA2theA2processA2of:A2-
A2Ans--activeA2transport
IfA2theA2nightA2temperatureA2dropsA250A2degrees,A2theA2roadrunner'sA2internalA2energy-
conservationA2permitsA2aA2loweringA2ofA2bodyA2temperatureA2to:A2-A2Ans--94°F
1A2kilogramA2(kg)A2ofA2solidA2XA2atA210CA2andA21A2kgA2ofA2solidA2YA210CA2eachA2absorbA25
A2joulesA2ofA2heatA2energy.A2TheA2finalA2temperaturesA2onA2XA2andA2YA2isA215CA2andA220
C,A2respectively.A2ComparedA2toA2X,A2YA2mustA2haveA2aA2lower:FA2-A2Ans--specificA2heat
AA2womanA2suddenlyA2chokesA2onA2aA2pieceA2ofA2foodA2andA2clutchesA2franticallyA2atA2he
rA2throat.A2AnA2immediateA2remedyA2isA2to:A2-A2Ans--
applyA2quick,A2hardA2pressuresA2successivelyA2toA2herA2abdomen,A2justA2belowA2herA2dia
phragm
AnA2unknownA2gasA2isA2moreA2denseA2thanA2air,A2doesA2notA2supportA2combustion,A2andA
2turnsA2aA2limewaterA2solutionA2cloudy.A2ThisA2gasA2isA2mostA2probably:A2-A2Ans--
carbonA2dioxide
NightA2blindnessA2inA2humansA2isA2causedA2byA2aA2lackA2of:A2-A2Ans--VitaminA2A
InA2varietiesA2ofA2matter,A2theA2termA2heterogeneousA2mayA2beA2appliedA2to:A2-A2Ans--
mixtures,A2butA2notA2elementsA2orA2compounds
TheA2atomsA2ofA2anA2elementA2withA2sevenA2valenceA2electronsA2areA2mostA2probablyA2cl
assifiedA2as:A2-A2Ans--nonmetals
TheA2inheritedA2factorsA2thatA2areA2transmittedA2inA2aA2organismA2fromA2generationA2toA2g
enerationA2areA2calledA2its:A2-A2Ans--genotype
WhichA2ofA2theseA2conditionsA2isA2associatedA2withA2smoking?A2-A2Ans--Emphysema
