Oceanic crust is primarily ________

A) basalt
B) carbonate sedimentary rocks
C) clay minerals
D) granite
E) siltstone


A

Environmental & Atmospheric Sciences

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Which aquatic ecosystem has the highest net primary productivity?

A. open ocean B. rivers and streams C. hydrothermal vents D. continental shelf E. estuaries

Environmental & Atmospheric Sciences

Vast, circular to elliptical dark-colored areas on the moon called maria represent ________

A) large volcanos B) large lowlands that were sea-beds when the moon had water C) very large impact craters filled with basaltic lava D) remnant highlands produced from a time when the moon was entirely molten

Environmental & Atmospheric Sciences

What evidence did Alfred Wegener use to support his hypothesis of continental drift? What additional evidence was added later (post-World War II) that suggested seafloor spreading? How do these two ideas unite to form the theory of plate tectonics?

What will be an ideal response?

Environmental & Atmospheric Sciences

Carbon dioxide warms the troposphere, enhancing the planet's natural

A. greenhouse effect B. tipping point C. biogeochemical cycle D. carbon cycle E. net primary production

Environmental & Atmospheric Sciences