PADI Open Water Diver Certification Exam Graded A+

PADI Open Water Diver Certification Exam Graded A+
Question : 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: 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.
Question : 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.

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