What is the source of water necessary to induce the production of magma in a subduction zone?
A. subducted ocean water
B. ocean water incorporated into crust at divergent plate boundaries
C. mantle-derived magmatic waters
D. meteoric water
Answer: B
You might also like to view...
Which of the following can be used as a fungal growth inhibitor?
A) calcium propionate B) sodium benzoate C) both a and b D) neither a nor b
Which of the following body fluids is always basic?
A) pancreatic fluid B) saliva C) urine D) all of them
Which of the following buffers will have the highest pH?
A) a solution containing 0.20 M HC2H3O2 and 0.20 M NaC2H3O2 B) a solution containing 0.25 M HC2H3O2 and 0.15 M NaC2H3O2 C) a solution containing 0.15 M HC2H3O2 and 0.25 M NaC2H3O2 D) They all have the same pH.
What is the speed of sound waves in water?
A) 1,500 m/sec B) 5,000 m/sec C) 3,200 m/sec D) 10,994 m/sec