Something underwater that does not float and does not sink is
________. Correct Answers Neutrally Bouyant
hh hh
If an object is neutrally buoyant in salt water. What will
probably happen to the object if you put it into fresh water?
Correct Answers The object will sink.
hh hh
Imagine a diver is 33 metres/99 feet underwater. The water
pressure at this depth would be ______times more than the
pressure at the surface. Correct Answers Four
hh hh
Imagine you hold a glass full of air upside down and you take it
to the bottom of the swimming pool without tipping it. The
density (thickness) of the air inside the glass will be ____ at the
surface. Correct Answers Greater than
hh hh
What should you do if you cannot equalize (clear) your ears or
sinuses while you are descending (going down)? Correct
hh
Answers Stop and ascend (go up) a few metres/feet and try to
hh
equalize (clear) again.
What should you do to prevent mask squeeze (a sucking or
pulling feeling on your face and eyes)? Correct Answers Blow
hh hh
into your mask through your nose.
Imagine you put air into a balloon underwater at 10 metres/33
feet and then you take it to the surface. The air in the balloon
, will: Correct Answers Expand to twice the size as it was at 10
hh hh
metres/33 feet.
What can happen to you if you hold your breath while ascending
(going up) on a scuba dive? Correct Answers Your lungs can
hh hh
over expand which could cause serious injury.
What is the most important feature of a scuba regulator? Correct hh
Answers How easy it is to breathe from it.
hh
Why is it important to practice the buddy system whenever you
go diving? Correct Answers Diving is easier, safer and more
hh hh
fun with a buddy.
When you look at things underwater they often seem ____ than
when you look at them on the surface. Correct Answers Nearer
hh hh
and larger
Sound travels faster in water and it is difficult to tell: Correct
hh
Answers Where the sound is coming from.
hh
If you get cold while diving and you cannot stop shivering
(shaking), what should you do? Correct Answers Stop diving
hh hh
right away, get out of the water, and change into something
warm.
Why do you want to move slowly and gradually underwater?
A. It is hard for you to swim fast against water.
B. So you use less air.
C. So you do not get tired.
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