When Eyjafjallajökull erupted in March 2010, ash plumes drifted southeast over Europe and, as a result, the controlled airspaces over many European countries were closed to air traffic,
stranding thousands of people worldwide. Why would flying a commercial jet through a cloud of volcanic ash be dangerous?
A) Ash can impede visibility if thick enough.
B) Hot ash will cause the plane to catch fire.
C) Abrasion of windows and engine parts from ash.
D) Engines can be clogged by ash.
E) Ash impairs visibility, clogs engines, and abrades engine parts.
Answer: E
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Over the past 35 years the number of storms has remained relatively constant, but there has been an 80%
increase in the abundance of Category ____________ and ____________ storms. Fill in the blank(s) with the appropriate word(s).
When a boulder and a pebble are dropped, the pebble falls as fast as the boulder because
A. both accelerate equally. B. both pick up speed equally. C. its ratio of gravitational force to mass is the same as the boulder's. D. air resistance is less for the pebble.
What are the four chemical reactions that comprise the Chapman mechanism? Which ones affect odd oxygen?
What will be an ideal response?
The oldest hominids belong to the genus ____________________
Fill in the blank(s) with correct word