EARTH SCIENCE
TECTONICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A large chunk of the ocean floor.
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A large chunk of crust and upper mantle.
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A large chunk of the lower mantle.
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A large chunk of Earth below a continent.
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Detailed explanation-1: -In plate tectonics, Earth’s outermost layer, or lithosphere-made up of the crust and upper mantle-is broken into large rocky plates. These plates lie on top of a partially molten layer of rock called the asthenosphere.
Detailed explanation-2: -The World Atlas names seven major plates: African, Antarctic, Eurasian, Indo-Australian, North American, Pacific and South American. California is located at the seam of the Pacific Plate, which is the world’s largest plate at 39, 768, 522 square miles, and the Northern American plate.
Detailed explanation-3: -A tectonic plate (also called lithospheric plate) is a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere.
Detailed explanation-4: -The lithosphere includes both the crust and the brittle upper portion of the mantle. The lithosphere is both the coolest and the most rigid of Earth’s layers.
Detailed explanation-5: -Plate tectonics is the theory that Earth’s outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core. The plates act like hard and rigid shells compared to Earth’s mantle. This strong outer layer is called the lithosphere.