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