The Arctic quiz
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Geographically, what ecological boundary marks the northern edge beyond which trees cannot grow?
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More questions about The Arctic
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What lies directly beneath the ice at the North Pole?
Answer: Ocean water
Why: No land lies under the North Pole: its sea ice floats on ocean more than 4,000 meters deep.
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What term describes a patch of unfrozen ground within permafrost?
Answer: Talik
Why: Taliks often form beneath deep Arctic lakes where water insulates the underlying ground from subzero air temperatures.
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What is the northernmost permanent land island on Earth?
Answer: Kaffeklubben Island
Why: Kaffeklubben Island sits at 83°39′ N off northern Greenland, closer to the North Pole than any other land.
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What Arctic whale is recognized by its prominent spiraled tusk?
Answer: Narwhal
Why: The narwhal's spiral tusk is actually an elongated upper tooth packed with sensory nerve pathways.
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Which Arctic marginal sea lies off the northern coastlines of Norway and Russia?
Answer: Barents Sea
Why: Parts of the southern Barents Sea stay ice-free year-round because the warm North Atlantic Drift reaches into it.
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Which Arctic seafloor ridge spreads slowest on Earth?
Answer: Gakkel Ridge
Why: The Gakkel Ridge widens by just 6 to 13 millimetres a year, slowing as it runs from Greenland toward Siberia.
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