1. The theory of Seafloor Spreading was proposed during the early 1960s. Who were the proponents of this theory?
a. Harry Hess and Robert Deitz
b. Alfred Wegener and Charles Darwin
c. Robert Boyle and Jacques Charles
d. Galileo Galilei and Albert Einstein
2. The following are the findings that support seafloor spreading theory except one. Which of the following does not belong to the group?
a. Rocks are younger at the mid-ocean ridge
b. Rocks far from the mid-ocean ridge are older.
c. Rocks at the ocean floor are younger than at the continents.
d. Sediments are thicker at the ridge.
3. The rate of the Seafloor spreading is not as fast as the destruction of the old seafloor. Which of the following interpretations is correct?
a. If the seafloor spreading is faster than the subduction, the ocean shrinks.
b. If the seafloor spreading is faster than the subduction, the ocean gets wider.
c. If the seafloor spreading is slower than the subduction, the ocean gets wider.
d. None of the above
4. What happens during magnetic reversal?
a. The North Pole is transformed into a South Pole and the South Pole becomes a North Pole.
b. The North Pole is transformed into a South Pole and the South Pole remains unchanged.
c. The North Pole remains unchanged and the South Pole becomes a North Pole.
d. The North Pole and the South Pole remains unchanged.
5. If the North Atlantic Ocean has a spreading rate of 1.46 cm per year, how far in kilometers will it spread in million years?
(1 km=100000cm)
a. 14600 kilometers
b. 1460 kilometers
c. 146 kilometers
d. 14.6 kilometers
6. What is the driving force that facilitates the movement of lithospheric plates?
a. Magnetic Force
b. Intergalactic Force
c. Convection Current
d. Gravitational Force
7. Which of the following are the forces that also contribute to the plate movements as a result of convection current?
a. Magnetic Force and Gravitational Pull
b. Seafloor Spreading
c. Ridge Push and Slab Pull
d. Convergent and Divergent
8. Each type of plate boundary has its own mechanism of plate movement. Which of the following Plate Boundary-Mechanism relationship is a mismatch?
a. Convergent Boundary – The plates move towards each other
b. Divergent Boundary – The plates move away from each other
c. Transform Fault – The plates slide past each other
d. None of the Above
For Items 9-10. Please choose the letter of the correct answer from the choices bellow:
As a result of convection current, forces such as Ridge Push and Slab Pull emerge. In what plate boundary can we find
9. Ridge Push? 10. Slab Pull?
a. Convergent Plate Boundary
b. Divergent Plate Boundary
c. Transform Fault Plate Boundary
d. Oceanic Boundary
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Answer:
wala ko kahibalo ana parehas ta bogo
Answer:
1. a. Harry Hess and Robert Deitz
2. d. sediments are thicker at the ridge.
3. a. If the seafloor spreading is faster than the subduction, the ocean shrinks.
4. a. The North Pole is transformed into a South Pole and the South Pole becomes a North Pole.
5. c. 146 kilometers
6. c. Convection Current
7. c. Ridge Push and Slab Pull
8. d. None of the Above
9. b. divergent Plate Boundary
10. a. convergent plate boundary