The seafloor spreading hypothesis indicates what as the primary cause of continental movement?
a. volcanism in the ocean crust
b. convergence of tectonic plates
c. the formation and destruction of ocean basins
d. the convection of mantle heat
e. the decay of radioactive isotopes
c. the formation and destruction of ocean basins
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_______________ is a thick sludge composed of water, with particles of coal, rock, and clay.
Fill in the blank.
Fractures that are simple cracks where the rock has pulled apart by a small amount are
A) joints. B) beds. C) faults. D) cracks.
Sachiko and Fred are having a discussion about the scientific method. Sachiko makes the comment that every time she sees people carrying open umbrellas, she also sees several small car accidents. This is a(n) ________
A) theory about car accidents B) theory about umbrellas C) hypothesis D) observation E) scientific study
The Superfund, established to clean up hazardous waste sites in the United States, is a part of the ________
A) Superfund Authority Act B) Comprehensive Environmental Response, Compensation, and Liability Act C) Hazardous Waste Management Act D) Superfund Management and Liability Act E) Resource Conservation and Recovery Act