Polar stratospheric clouds<span>. </span>Polar stratospheric clouds<span> (PSCs) play a central role in the formation of the </span>ozone<span> hole in the Antarctic and Arctic. ... These reactions lead to the production of free radicals of chlorine in the </span>stratosphere<span> which directly destroy</span>ozone<span> molecules.</span>
Answer:
(A) True
Explanation:
The Cascadia subduction zone is 1,100 kilometers long, and its characteristics of youthful oceanic plate and strong coupling with the overriding plate are similar to situations in southwestern Japan and southern Chile where very large earthquakes have occurred. The Cascadia subduction zone is a convergent plate boundary that stretches from Northern Vancouver Island to Cape Mendocino California, It results from the subduction of the Juan de Fuca Plate beneath the North American plate. The Cascadia subduction zone is stable with no significant seismic activity.
Answer:
In Colorado, Alamosa, North America.
Explanation:
The Great Sand Dunes, in southern Colorado, are the tallest in North America, with a few dunes towering over 700 feet. it features 30 square miles of rolling sand dunes along with incredible high-elevation mountains.
The dune takes two hours to climb.On March 17, 1932, the Great Sand Dunes were designated as a National Monument. It was until the 2000, that was when the Great Sand Dunes were considered a national park and preserve.
