Jet streams:
A) are usually about ten miles wide.
B) were first detected by George Hadley.
C) occur about 2-12 kim above the surface in middle latitudes.
D) reverse direction 180 degrees in summer.
E) do not go below 50 degrees latitude.
C
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In the __________ Ocean, the monsoon weather pattern, with prevailing winds blowing westward during part of the year and eastward during part of the year, enabled trade over a wide area from Africa to southeast Asia.
Fill in the blank(s) with the appropriate word(s)
When Nellie is in a high-flying jumbo jet she feels her normal weight. But she doesn't feel her weight when she is in an orbiting space vehicle because she is then
A. beyond the main pull of Earth's gravity. B. without support forces. C. above the Earth's atmosphere. D. all the above
Moving poleward, vegetation in the tundra biome grades from
A) lichens to stunted trees to grasses. B) grasses to stunted trees to lichens. C) stunted trees to lichens to grasses. D) stunted trees to grasses to lichens.
Water's salinity can be increased by
A. decreased rates of evaporation. B. ice freezing. C. entering freshwater streams. D. ice melting.