Oceanic Jeopardy!
Feb 24, 2016
Oceanic Jeopardy!
Oceanic Jeopardy!Ocean
History
Ocean Topograph
yZones Marine
Biology Potpourri
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How did the crew of the HMS Challenger map the
ocean floor?
By lowering a weighted line until it touched the bottom...
Over and over again.
What are three factors that make ocean
exploration difficult?
A lack of light, near-freezing temperatures, and
extreme pressures.
How does the modern way of exploring the
ocean floor work? What does it stand for.
SONAR sends sound waves that bounce off the ocean
floor and return to the ship. SONAR stands for SOund NAvigation and Ranging.
Mapping the ocean floor has resulted in the discovery of the
Mid-Ocean Ridge and numerous trenches. How are
they important?
The MOR and trenches play a part in sea-floor spreading: the generation
and destruction of crust.
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Final Jeopardy
What was the ocean floor believed to be
like? What is the name of this type of region.
The ocean floor was believed to be flat like a
desert. This region is called an Abyssal Plain.
The coastline does not truly end at the water’s edge.
Describe the 2 features that extend into the ocean,
under the water.
The Continental Shelf is a gently sloping, shallow area. The
Continental Slope is a steep incline at the shelf’s edge.
Describe a Seamount. If it was located in a tropical area, what feature could a
seamount form near the surface?
A Seamount is an underwater mountain / island that does not reach the surface. It may have formed an
Atoll.
This picture shows an active volcanic region. What is it called and what topographic feature
are you likely to find on the ocean floor?
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Final Jeopardy
This picture shows the Ring of Fire. A likely topographic feature you might find is a trench,
where the crust can subduct.
List the following zones in order of most to least marine life:
Intertidal, Open Ocean, Neritic
List the following zones in order of most to least marine life:
NeriticIntertidal
Open Ocean
Where does the Intertidal Zone begin and end? Where does the
Neritic Zone begin and end?DAILY DOUBLE!
The Intertidal Zone begins at the high tide line and ends at
the low tide line.The Neritic Zone begins at
the low tide line and ends at the continental slope.
What is one of the key differences between the
Surface / Photic Zone and the Deep Zone? How have
organisms in the Deep Zone adapted to this?
The key difference is the amount of light. Because
there is no light in the Deep Zone, some organisms have developed Bioluminescence.
What are 5 factors that make living in the Intertidal Zone
so difficult?
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Final Jeopardy
Difficult factors include:Salinity
Water temperatureLight
Dissolved GasesNutrients
Wave action
The largest animal, the Blue Whale, relies on tiny krill. Life in the ocean is
connected through a ____ ___.
The largest animal, the Blue Whale, relies on tiny krill. Life in the ocean is connected through a food
web.
What are the 3 categories that marine organisms are divided
into and why?
Organisms are divided into Plankton (go with the flow), Nekton (move freely) and Benthos (move on
the bottom) categories.
What makes a Slat Marsh a good place for life?
Salt marshes contain a lot of decayed matter / nutrients, rich mud to feed and hide in, and cordgrass to
provide shelter.
Estuaries and Coral Reefs are two marine environments. What are
their characteristics?
Coral Reefs are located in shallow, tropical environments. Sensitive to changes. Centers
of diverse marine life.Estuaries are found in coastal areas. Water is
brackish (mix of salty and fresh). Protect coastline from changes by severe weather.
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Final Jeopardy
Name 2 animals that use bioluminescence.
Two animals that use bioluminescence are
fireflies and angler fish.
What is a Hydrothermal Vent and why is it relevant
to marine life?
A Hydrothermal Vent is where water heated by magma jets
out of the ocean floor, releasing gases and minerals
from Earth’s interior.
Put these stages in the correct order:
Atoll, Fringing Reef, Barrier Reef
Fringing ReefBarrier Reef
Atoll
Going deep underwater can crush you because of the pressure. Coming to the surface from far down can also cause
pressure-related problems. What is this called and why is it dangerous?
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Final Jeopardy
Rising too quickly to the surface from a far depth is called “the
bends.” Gas that was under pressure rapidly expands.
Like SONAR, the word SCUBA is an acronym. It refers to the tank of oxygen
divers use to breath underwater. What does SCUBA stand for?
603010 SCUBA
STOP
SelfContainedUnderwaterBreathingApparatus