If new seafloor is being created at spreading centers, why don't we find a lot of old oceanic crust on the surface of the Earth? Because oceanic crust is being ____ where it collides with continental plates.
A ) folded
B ) pushed up
C ) subducted
D ) vaporized
C ) subducted
Environmental & Atmospheric Sciences
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The ____________ ____________ is a current in the Northern Atlantic that exerts a moderating influence on the
winter climate of northwestern Europe. Fill in the blank(s) with the appropriate word(s).
Environmental & Atmospheric Sciences
How much of Earth's surface is desert?
A) 40% B) 25% C) 45% D) 30% E) 35%
Environmental & Atmospheric Sciences
If the load exceeds a stream's capacity, sediment accumulates in the bed in a process called
A) saltation. B) aggradation. C) degradation. D) downcutting.
Environmental & Atmospheric Sciences
Which is not a key problem associated with the use of septic systems?
A. Contamination of groundwater by harmful pathogens B. Contamination of groundwater by heavy metals C. Contamination of groundwater by nitrogen D. Contamination of groundwater by phosphorous
Environmental & Atmospheric Sciences