PHYS /
203
/ /
EXAM 2 NJIT QUESTIONS WITH CORRECT ANSWERS
/ // // // // // //
Molten //rock //below //earth's //surface //is... //- //CORRECT //ANSWERS(S)✔✔Magma
Molten //rock //on //earth's //surface //is... //- //CORRECT //ANSWERS(S)✔✔Lava
The /
/violence /
/of /
/volcanic /
/eruptions /
/is //mainly //controlled //by... //- //CORRECT //ANSWERS(S)✔✔The //viscosity //of //the //magma
High /
/viscosity /
/of //magma //- //CORRECT //ANSWERS(S)✔✔More //violent //eruptions //(Mount //St. //Helens)
Less /
/viscosity /
/of //magma //- //CORRECT //ANSWERS(S)✔✔Less //violent //eruptions //(Hawaii //over //a //hot //spot)
Composition //and //temperature //control... //- //CORRECT //ANSWERS(S)✔✔Viscosity
Lower //temperature //gives...
Higher //silica //(SiO2) //content //gives... //- //CORRECT //ANSWERS(S)✔✔Higher //viscosity
,Basaltic /
/lava /
/has /
/low /
/viscosity /
/due /
/to /
/having... //- /
/CORRECT //ANSWERS(S)✔✔Less //than //53% //silica //and //magma //temperature //of //1100-
1250 //Celsius
Rhyolitic /
/lava /
/has /
/high /
/viscosity /
/due /
/to /
/having... //- /
/CORRECT //ANSWERS(S)✔✔More //than //68% //of //silica //and //magma //temperature //of //700-
850 //Celsius
Volcanic /
/gases, /
/such /
/as //CO2, //escape //more... //- //CORRECT //ANSWERS(S)✔✔Easily //from //low //viscosity //magma
Majority /
/of /
/active /
/volcanoes //are //located //at... //- //CORRECT //ANSWERS(S)✔✔Convergent //plate //boundaries
A/
/shield /
, /volcano /
/is... //- /
/CORRECT /
/ANSWERS(S)✔✔Gentle /
/slopes //that //are //formed //by //longer //distance //of //low //viscosity //lava //flow
A/
/strato /
/volcano /
/is... //- /
/CORRECT /
/ANSWERS(S)✔✔Cone /
/shaped /
/with //steep //slopes //that //are //formed //by //shorter //distance //of //high //viscosity //lava //flow
Volcanic /
/debris /
/carried /
/by /
/prevailing /
/winds /
/(tephra /
/and /
/gasses) /
/and /
/flowing /
/on /
/the /
/ground /
/(lahar) /
/affect... //- /
/CORRECT //ANSWERS(S)✔✔Areas //hundreds //of //kilometers //away //from //volcanic //eruptions.
A/
/large /
203
/ /
EXAM 2 NJIT QUESTIONS WITH CORRECT ANSWERS
/ // // // // // //
Molten //rock //below //earth's //surface //is... //- //CORRECT //ANSWERS(S)✔✔Magma
Molten //rock //on //earth's //surface //is... //- //CORRECT //ANSWERS(S)✔✔Lava
The /
/violence /
/of /
/volcanic /
/eruptions /
/is //mainly //controlled //by... //- //CORRECT //ANSWERS(S)✔✔The //viscosity //of //the //magma
High /
/viscosity /
/of //magma //- //CORRECT //ANSWERS(S)✔✔More //violent //eruptions //(Mount //St. //Helens)
Less /
/viscosity /
/of //magma //- //CORRECT //ANSWERS(S)✔✔Less //violent //eruptions //(Hawaii //over //a //hot //spot)
Composition //and //temperature //control... //- //CORRECT //ANSWERS(S)✔✔Viscosity
Lower //temperature //gives...
Higher //silica //(SiO2) //content //gives... //- //CORRECT //ANSWERS(S)✔✔Higher //viscosity
,Basaltic /
/lava /
/has /
/low /
/viscosity /
/due /
/to /
/having... //- /
/CORRECT //ANSWERS(S)✔✔Less //than //53% //silica //and //magma //temperature //of //1100-
1250 //Celsius
Rhyolitic /
/lava /
/has /
/high /
/viscosity /
/due /
/to /
/having... //- /
/CORRECT //ANSWERS(S)✔✔More //than //68% //of //silica //and //magma //temperature //of //700-
850 //Celsius
Volcanic /
/gases, /
/such /
/as //CO2, //escape //more... //- //CORRECT //ANSWERS(S)✔✔Easily //from //low //viscosity //magma
Majority /
/of /
/active /
/volcanoes //are //located //at... //- //CORRECT //ANSWERS(S)✔✔Convergent //plate //boundaries
A/
/shield /
, /volcano /
/is... //- /
/CORRECT /
/ANSWERS(S)✔✔Gentle /
/slopes //that //are //formed //by //longer //distance //of //low //viscosity //lava //flow
A/
/strato /
/volcano /
/is... //- /
/CORRECT /
/ANSWERS(S)✔✔Cone /
/shaped /
/with //steep //slopes //that //are //formed //by //shorter //distance //of //high //viscosity //lava //flow
Volcanic /
/debris /
/carried /
/by /
/prevailing /
/winds /
/(tephra /
/and /
/gasses) /
/and /
/flowing /
/on /
/the /
/ground /
/(lahar) /
/affect... //- /
/CORRECT //ANSWERS(S)✔✔Areas //hundreds //of //kilometers //away //from //volcanic //eruptions.
A/
/large /
