What powers hurricanes, and how do winds move within these atmospheric disturbances?
At its base, air is sucked in by low pressure in the hurricane's eye, its center,
and rises rapidly to the top where the winds spiral air outward. The rapid upward movement of moisture-laden air produces enormous amounts of rain. The power that drives the storm is increased by the massive release of latent heat energy from condensation. Upper air returns to the surface through the hurricane's eye.
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Light that reflects from a pane of glass
A. can be thought of as a reverse gulp-burp. B. increases a bit in frequency C. decreases a bit in frequency. D. decreases a bit in speed.
The two types of geologic age dates are ________ and ________ Fill in the blank(s) with the appropriate word(s)
In Appalachia, many miners are out of work because ________
A) coal extraction has decreased because the region is beginning to run out of coal B) they were fired for protesting mountaintop removal C) mountaintop removal is highly mechanized, and thus they are not needed D) of local protests that shut down mining operations E) of a moratorium on mountaintop removal
About half of the world's languages are expected to disappear this century in what linguists call __________ __________, when a tongue's last speaker dies
Fill in the blank(s) with correct word