The main way new oceanic crust is created is by
A. sediment scraped off a subducting slab.
B. eruption of lavas and solidification of magmas at depth.
C. continental rifting, before the continents separate.
D. continents that subside below sea level.
E. magmas along an ocean-continent convergent boundary.
Answer: B
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A) 1 B) 2 C) 5 D) 8 E) 10
Oceanic crust has a mafic composition and therefore is denser than continental crust
Indicate whether the statement is true or false
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A. longest dimension B. upwind surface C. slip face D. gentle slope E. coarsest grains
What agricultural practice is based on the constructions of dikes to flood fields?
A) communal farming B) paddy farming C) swidden farming D) gendered rice cultivation E) none of the above