Question

14. Why are most subduction zones located near the edge of continents? a. This is commonly the location where continental crust and oceanic crust meet. b. A density difference between subducting plates create a significant void at the point of subduction. c. Ocean water causes the colliding plates to cool and contract. d. All of the above. 15. (1) What is an island arc? a. A large wooden boat that ferries animals from one island chain to another. b. A crescent shaped volcanic mountain chain created by plate tectonic volcanism. C. An anomalous electrical charge. d. None of the above. 16. (1) What nation is split apart by the Mid Atlantic Ridge? a. The North Pole b. The Arctic region C. Greenland d. Iceland 17.(1) What is the largest geologic feature on Earth? a. The Grand Canyon b. The Deccan Flats in India C. The Himalayan Mtns. d. The mid Atlantic Ridge 18.(1) What is the main relative motion between the North American Plate and the Eurasian Plate? a. Convective b. Convergent C. Rotational d. Divergent 19. (1) What is the engine that drives plate movement? a. The convective circulation in the upper mantle b. The Earth's rotation C. Solar gravitational pull on the Earth d. Terrestrial orbital aberrations

Answer 1

14. Most subduction zones are at the boundaries of continents because it is the place where the oceanic and continental crust meet and oceanic crust being denser subducts.

So option a is correct.

15. An island arc is a crescent-shaped island arc formed in the ocean due to the plate tectonics or subduction.

So option b is correct.

16. The country named Iceland is split apart by the mid-Atlantic ridge.

So option d is correct.

17. The largest geological feature on the Earth is the Mid -Atlantic ridge.

So option d is correct.