Dreams of finding the Northwest Passage motivated many of the earliest explorers to brave the challenges of the Far North. Will global warming help make this elusive concept a reality for travelers in the 21st century? Where and why?
What will be an ideal response?
Yes, because of global warming and the reduction of Arctic ice sheets, the Northwest Passage, now only open to reinforced ice-breaking vehicles, could be open to conventional craft for a few weeks per year in the summer.
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The ____________ ____________ ____________ is a constellation of 24 satellites in orbit 17,000 kilometers above
Earth. Fill in the blank(s) with the appropriate word(s).
Why is the extraction of wind so effective over or near the ocean?
A) There are large gusts of wind. B) The wind tends to be steady in these areas. C) Windmills can be easily constructed on platforms. D) There is more stress on the gears to generate more energy.
What chemical change occurs when a wax candle burns?
A. The wax within the wick is heated to about 600°C. B. The molten wax is pulled upward through the wick. C. The wax near the flame melts. D. The heated wax molecules combine with oxygen molecules.
The majority of African Americans live in
A. the Midwest B. the Southwest C. the Southeast D. the Pacific Northwest