PADI, /
Open
/ /
Water
/ /
Diver,
/ /
Final Exam Review Questions With Answers
/ // // // // //
1) /
/If /
/an /
/object /
/is /
/neutrally /
/buoyant /
/(does //not //sink //or //float) //in //fresh //water, //the //same //object //placed //into //salt //water //would
A //sink.
B //either //sink //or //float.
C //do //nothing.
D //float. //- //correct //answer(s) //✔✔ //D //float.
Salt /
/water /
/is /
/heavier /
/than /
/fresh /
/water /
/because /
/it /
,/has /
/dissolved /
/minerals /
/in //it. //This //means //it //causes //more //upward //force //(buoyancy) //on //an //object. //An //object //that
//is /
/neutrally /
/buoyant /
/in //fresh //water //would //float //in //salt //water //because //there //is //greater //upward //force. //
See //Being //a //Diver //I //- //Buoyancy //and //Controlling //Buoyancy.
2) //
I/
/blow /
/up //
a/
/balloon, /
/tie /
/it /
/off, /
/and /
/take /
/it /
/to /
/the /
/bottom //of //the //swimming //pool. //What //will //happen //to //the //balloon //and //the //air //inside //it?
A/
/The /
/balloon /
/will /
/get /
/bigger /
/and //the //air //inside //the //balloon //will //be //less //dense //(molecules //move //further //apart).
,B/
/The /
/balloon /
/will /
/get /
/smaller /
/and //the //air //inside //the //balloon //will //be //more //dense //(molecules //move //closer //together).
C //The //balloon //will //get //bigger //and //the //air //inside //the //balloon //will //be //more //dense.
D/
/The /
/balloon /
/will /
/get /
/smaller /
/and /
/the /
/air /
/inside /
/the /
/balloon /
/will /
/be /
/less /
/dense. //- /
/correct /
/answer(s) /
/✔✔ //
B/
/The /
/balloon /
/will /
/get /
/smaller /
/and //the //air //inside //the //balloon //will //be //more //dense //(molecules //move //closer //together).
, As /
/water /
/pressure /
/increases, /
/the /
/volume /
/of /
/an /
/air /
/space /
/will /
/decrease. /
/This /
/causes /
/the /
/density /
/of /
/the /
/air /
/inside //to //increase //and //air //molecules //are //pushed //closer //together. //The //balloon //would //get
//smaller //and //the //air //density //inside //would //be //greater. //
See //Being //a //Diver //I //- //Water //Pressure //and //Air //Volume //Effects.
3) //
I/
/turn //a //glass //upside //down, //trap //the //air //in //it //by //putting //it //in //water, //and //then //I //take //the
//glass //down //to //10 //meters. //The //air //space //would
A //become //half //the //size //it //was //at //the //surface.
B //not //change //in //size.
C //become //1/3 //the //size //it //was //at //the //surface.
D/
/become /
Open
/ /
Water
/ /
Diver,
/ /
Final Exam Review Questions With Answers
/ // // // // //
1) /
/If /
/an /
/object /
/is /
/neutrally /
/buoyant /
/(does //not //sink //or //float) //in //fresh //water, //the //same //object //placed //into //salt //water //would
A //sink.
B //either //sink //or //float.
C //do //nothing.
D //float. //- //correct //answer(s) //✔✔ //D //float.
Salt /
/water /
/is /
/heavier /
/than /
/fresh /
/water /
/because /
/it /
,/has /
/dissolved /
/minerals /
/in //it. //This //means //it //causes //more //upward //force //(buoyancy) //on //an //object. //An //object //that
//is /
/neutrally /
/buoyant /
/in //fresh //water //would //float //in //salt //water //because //there //is //greater //upward //force. //
See //Being //a //Diver //I //- //Buoyancy //and //Controlling //Buoyancy.
2) //
I/
/blow /
/up //
a/
/balloon, /
/tie /
/it /
/off, /
/and /
/take /
/it /
/to /
/the /
/bottom //of //the //swimming //pool. //What //will //happen //to //the //balloon //and //the //air //inside //it?
A/
/The /
/balloon /
/will /
/get /
/bigger /
/and //the //air //inside //the //balloon //will //be //less //dense //(molecules //move //further //apart).
,B/
/The /
/balloon /
/will /
/get /
/smaller /
/and //the //air //inside //the //balloon //will //be //more //dense //(molecules //move //closer //together).
C //The //balloon //will //get //bigger //and //the //air //inside //the //balloon //will //be //more //dense.
D/
/The /
/balloon /
/will /
/get /
/smaller /
/and /
/the /
/air /
/inside /
/the /
/balloon /
/will /
/be /
/less /
/dense. //- /
/correct /
/answer(s) /
/✔✔ //
B/
/The /
/balloon /
/will /
/get /
/smaller /
/and //the //air //inside //the //balloon //will //be //more //dense //(molecules //move //closer //together).
, As /
/water /
/pressure /
/increases, /
/the /
/volume /
/of /
/an /
/air /
/space /
/will /
/decrease. /
/This /
/causes /
/the /
/density /
/of /
/the /
/air /
/inside //to //increase //and //air //molecules //are //pushed //closer //together. //The //balloon //would //get
//smaller //and //the //air //density //inside //would //be //greater. //
See //Being //a //Diver //I //- //Water //Pressure //and //Air //Volume //Effects.
3) //
I/
/turn //a //glass //upside //down, //trap //the //air //in //it //by //putting //it //in //water, //and //then //I //take //the
//glass //down //to //10 //meters. //The //air //space //would
A //become //half //the //size //it //was //at //the //surface.
B //not //change //in //size.
C //become //1/3 //the //size //it //was //at //the //surface.
D/
/become /
