When chlorofluorocarbons (CFCs) are subjected to sunlight, they release ________, in turn leading to the destruction of ozone molecules
A) chlorine
B) hydrogen
C) nitrogen
D) carbon
E) carbon dioxide
A
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Why is climate change affecting polar bears in a disproportionate way?
A. It is melting their habitat. B. The high temperature is making them sweat to death. C. The seals they hunt for food are migrating south. D. They are unable to adapt to coastal flooding.
Although continental glaciers existed in many areas 20,000 years ago, there are none on Earth today
Indicate whether the statement is true or false.
When two continents collide, they are welded together along a zone marking the former site of subduction. At this continental-continental plate boundary, a(n) ____ is formed
A)island arc B)abyssal plain C)trench D)interior mountain belt E)transform fault
Magma differentiation tends to produce deposits of ________ near the base of intrusions
A) chromite B) silver C) gold D) copper