The Arctic's endangered ice.As Earth has warmed over the years, longtime Arctic residents have noted some changes. In the Bering Strait Bering Strait, c.55 mi (90 km) wide, between extreme NE Asia and extreme NW North America, connecting the Arctic Ocean and the Bering Sea. It is usually completely frozen over from October to June. The Diomede Islands are in the strait. area of the Arctic, the Arctic, the northernmost area of the earth, centered on the North Pole. The arctic regions are not coextensive with the area enclosed by the Arctic Circle (lat. sea usually freezes in mid-November and begins breaking up in late Mayo In some parts of the Arctic, however, the ice is melting earlier in the year than it once did. This map shows how the southernmost edge of that ice has changed in the recent past. Study the map, then answer the questions. QUESTIONS 1. This map reflects the extent of the Arctic ice edge over time during which month? 2. Since the 1970s, the average late-April ice edge has advanced or declined? 3. Which ice-edge line reflects the most recent data? 4. Which line shows the average for the most years? 5. What named chain of islands is part of the state of Alaska? 6. What geographic feature separates Alaska and Russia at their closest point? 7. Is the U.S. village of 6ambell closer to Nome, Alaska Nome is a city located on the southern Seward Peninsula coast of Norton Sound in the Nome Census Area of the U.S. state of Alaska. According to 2005 Census Bureau estimates, the city population was 3,590. , or Novoye Chaplino, Russia? 8. Which named line of latitude Noun 1. line of latitude - an imaginary line around the Earth parallel to the equator parallel of latitude, parallel, latitude polar circle - a line of latitude at the north or south poles crosses the two continents? 9. What significant time-zone indicator separates the landmasses? 10. If it is April 1 in Russia, what date is it in Alaska? ANSWERS 1. April 2. declined 3. the solid line (for April 24,2006) 4. the one for 2000-2005 5. the Aleutian Islands Aleutian Islands (əl  `shən), chain of rugged, volcanic islands curving c.1,200 mi (1,900 km) west from the tip of the Alaska Peninsula and approaching Russia's Komandorski Islands. 6. the Bering Strait 7. Novoye Chaplino, Russia 8. the Arctic Circle Arctic Circle, imaginary circle on the surface of the earth at 66 1-2°N latitude, i.e., 23 1-2° south of the North Pole. It marks the northernmost point at which the sun can be seen at the winter solstice (about Dec. 9. the international date line 10. March 30 |
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