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11. Scientist found out that there was one big continent on earth billions of years ago called 12. are large pieces of rocks that compose of the continents and ocean floors. 13. When two crustal plates move toward each other is formed. 14. Continental plates is crust where are located. 15. are formed when an oceanic plate moves downward as it collides with a continent plate. Tectonic Plates land masses subduction zone Trenches Pangea​

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Answer:

11). IN 1912, German scientist Alfred Wegener proposed that Earth's continents once formed a single, giant landmass, called Pangaea.

12). "Tectonic plate"

massive slab of solid rock made up of Earth's lithosphere (crust and upper mantle)

13). If two tectonic plates collide, they form a convergent plate boundary. Usually, one of the converging plates will move beneath the other, a process known as subduction. Deep trenches are features

14). Continental crust, the outermost layer of Earth's lithosphere that makes up the planet's continents.

and continental shelves and is formed near subduction zones at plate boundaries between continental and oceanic tectonic plates.

The continental crust forms nearly all of Earth's

land surface.

15). (C) Oceanic crust continues sliding under the continental crust forming a new subduction zone and a new submarine trench.

The two continental crusts begin to fuse. Ocean trenches are steep depressions in the seafloor formed at subduction zones where one plate moves downward beneath another (Fig. 7.24 C).

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