1. Whichofthe followingis an exampleofaquantitative observation?
A) Thepieceofmetal is longerthan thepieceofwood.
B) Solution 1ismuchdarkerthansolution2.
C) Theliquid in beaker Aisblue.
D) Thetemperatureof theliquid is60°C.
E) Atleasttwooftheabove(A-D)arequantitative observations.
ANS:D DIF: Easy REF: 1.2
KEY:Chemistry|generalchemistry|generalconcepts|scientificmethod MSC:
Conceptual
2. Aquantitative observation
A) containsanumberand aunit
B) doesnot containa number
C) alwaysmakesa comparison
D) mustbeobtainedthroughexperimentation
E) is noneofthese
ANS:A DIF: Easy REF: 1.2
KEY:Chemistry|generalchemistry|generalconcepts|scientificmethod MSC:
Conceptual
3. Generally,observedbehaviorthatcanbeformulatedintoastatement,sometimes
mathematical in nature, is called a(n)
A) observation
B) measurement
C) theory
D) natural law
E) experiment
ANS:D DIF: Easy REF: 1.2
KEY:Chemistry|generalchemistry|generalconcepts|scientificmethod MSC:
Conceptual
4. Thestatement“Thetotalmassofmaterialsisnotaffectedbyachemicalchangeinthose
materials” is called a(n)
A) observation
B) measurement
C) theory
D) natural law
E) experiment
ANS:D DIF: Easy REF: 1.2
KEY:Chemistry|generalchemistry|generalconcepts|scientificmethod MSC:
Conceptual
5. Achemical theorythat has beenknownforalong timebecomes alaw.
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