Divemaster Final Exam A part 2 Questions and Answers 100% Pass
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Course
Divemaster
Institution
Divemaster
True or False. When an alien (invasive) species is introduced into an ecosystem, it may have no natural
enemies, which allows it to quickly multiply and possibly overtake and kill off native species. -
True.
Flying after diving recommendations suggest that divers wait __________ hours after comp...
Divemaster Final Exam A part 2
True or False. When an alien (invasive) species is introduced into an ecosystem, it may have no natural
enemies, which allows it to quickly multiply and possibly overtake and kill off native species. -
True.
Flying after diving recommendations suggest that divers wait __________ hours after completing a single
dive and _________ hours after completing multiple dives for several days before flying in a commercial
jet airliner.
a.
b. 4 / an extended period beyond 12
c.
d. 24 / an extended period beyond 24 - c.
What is the ocean's major source of productivity and the base of the marine food chain?
a. Krill
b. Seagrass
c. Coral
d. Phytoplankton - d. Phytoplankton
True or False. Natural processes, such as earthquakes and storms, are much more of a severe threat to
coral reefs and wetlands than human-induced threats, such as pollution. - False.
,A _______________ exists when relatively warm, low-density surface water is separated from cool, high-
density deep water.
a. freshwater layer
b. thermocline
c. downwelling
d. rip current - d. thermocline
If you stand on a beach and watch water generally moving down the coast, pushed by waves
approaching the shore at an angle and assisted by the prevailing wind, you are looking at a _______
current.
a. rip
b. tidal
c. longshore
d. upwelling - c. longshore
A day after strong winds drive surface waters offshore, you notice that water conditions become clear
and cool. This is likely due to:
a. downwelling
b. extreme tides.
, c. a longshore current.
d. upwelling - d. upweling
Gravitational interaction between the sun, moon and earth cause ______, while wind is the most
common disturbing force that causes ___________.
a. tides / waves
b. surge / currents
c. rip currents / ocean swells.
d. waves / tides - a. tides / waves.
Ways that you can encourage divers to protect the underwater world include:
a. be a role model for others divers, dive carefully and be aware of equipment placement when diving.
b. respect underwater cultural heritage and maritime history.
c. report environmental disturbances or destruction and get involved in local environmental activities
and issues.
d. All of the above. - d. All of the above.
While outside, at a very cold temperature, you fill a balloon with air. What will happen when you take
the balloon inside and place it near a heater?
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