Living in the Dark by Cheryl Bardoe - Review

Marine snow is a source of

• oxygen.

• food.

• light.

• bacteria.

Why did scientists prior to 1977 believe that only very basic life forms existed in the deep ocean?

• They thought that the currents were too strong.

• They thought that hydrothermal vents released poisonous gases.

• They thought that there was no substantial food source.

• They thought that the temperatures were too cold.

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Why were scientists surprised to find a "Garden of Eden" near hydrothermal vents?

• It was thought that the environment could not support life.

• The vents were not expected to exist.

• The creatures were just like those living on land.

• The scientists were geologists, not biologists.

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According to the article, what is one way in which technology is making ocean research easier?

• Newer cameras are smaller and less expensive.

• Larger and faster undersea vehicles are being built.

• Unmanned remote vehicles can be used instead of divers.

• Video footage of dives can be sent to scientists around the world.

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How do cold seep communities affect Earth's climate?

• They prevent greenhouse gases from escaping.

• They leak cold air into the atmosphere.

• They form around large deposits of oil and natural gas.

• They release a large amount of methane into the atmosphere.

What conclusion can scientists draw from seeing the same species at whale falls, cold seeps, and hydrothermal vents?

• The communities develop in a similar way in all three habitats.

• Species use whale falls as stepping stones from one habitat to another.

• Whale falls support the largest number of different species.

• Each habitat is isolated from the others by vast ocean distances.

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A cache is something that has been

• found.

• submerged.

• hidden.

• destroyed.

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What is a geyser?

• a gas leak

• an undersea habitat

• a chemical process

• a natural hot spring

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A meager meal is one that is

• hearty.

• delicious.

• insufficient.

• bland.

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When things decompose they

• break down.

• change color.

• store energy.

• change size.

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