.ill Sprint 5:11 PM 84% LAB 2-Plate Tectonics and the Origin Chapter 2: The Way
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.ill Sprint 5:11 PM 84% LAB 2-Plate Tectonics and the Origin Chapter 2: The Way the Earth Works: Examining 1. The process that continually adds new crust is: 8 What causes the te A Ocean currents A. Subduction B. Earthquakes C. Sea-floor spreading D. Convection B. Volcanoes c.The Coriolis effec D. Convection in the 9. The mid-ocean ridg A Convergent bou B. Transform boun 2. The ring of fire is a ring of volcanoes and earthquakes that occur along: A. The mid-ocean ridge B. Plate boundaries C. Hot spots D. Only transform boundaries C. Divergent bound place D. Divergent boun 3. Where two plates rub past each other in opposite directions is a 10. When two contin A. Convergent boundary B. Transform boundary C Hot spot D. Divergent boundany A. Subduction zone B. Mountain range C. Earthquake o. Rift valley 4. The place where two plates collide is called a 11. Oceanic crust is continental crust. A. Less dense A. Transform boundary B. Hot spot C. Divergent boundary D. Convergent boundary B. More dense 12. Continental crus oceanic crust A. Thicker 8. Thinner 5. The place where two plates move apart is called a: A. Divergent boundany B. Hot spot C. Convergent boundary D. Transform boundary 13. A place where a through the crust c A. Divergent bou 6. Subduction is when: B. Hot spot A Earthquakes occur along a transform boundary B. New crust is formed C. One plate slides under another D. New islands are formed C. Convergent b D. Transform bo 14. The fact that k A. The mantle ca B. The mantle is C. The less dens D. The crust is m 7. Pieces of Earth's crust move on top of the A. Ocean B. Mantle C. Outer core D. Inner coneExplanation / Answer
1. C. Sea-floor spreading.
New magma from the mantle rises up and continously creates new oceanic plate at the Mid oceanic ridge. During the creation of new oceanic plate, ridge push force generates and due to this force sea-floor spreading occurs.
2. B. Plate boundaries (covergent type).
Due to the subduction of the denser and heavier Pacific plate beneath the continental plates of Eurasian and American (both North and South) plates, a chain of volcanic islands (island arc) formed and this is called the Pacific Ring of Fire.
3. B. Transform boundary.
It is a regional strike slip fault. It is also called conservative type of plate boundary where plates are not destroyed or created. Example- San Andreas Transform fault.
4.D. Convergent boundary.
In a collisional convergent boundaries, two continental plates collides. As both plates are less denser than the Mantle, so neither of the plates will subduct. Example- The Himalayas formed by collision of Indian plate with Eurasian plate.
5. A. Divergent boundary.
The two oceanic plates are created at the Mid Oceanic Ridges and diverges away from each other. This type of plate boundary is also called the Constructive type of plate boundary.
6.C. One plate slides under another.
Subduction can occur when a denser oceanic plate subducts beneath, either a lighter oceanic plate or a continental plate at the convergent plate margins.
7. B. Mantle.
Pieces of earth's crust floats over asthenosphere. Asthenosphere is a part of upper mantle.
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