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Hint:
i) Divergent plate borders are what give rise to oceanic plates. Upwelling magma produces fresh oceanic crust in these areas, which are found around mid-ocean ridges. Extrusive igneous rock is produced as lava spills from these volcanic ridges and cools rapidly.
ii) Continental plates are when the majority of plate displacement is caused by thermal convection, which occurs as heat from the Earth's interior allows waves of hot rising magma and colder falling magma to flow, pushing the crustal plates along with them.
Complete answer:
The thickness and composition of the crust of oceanic and continental plates vary significantly. The difference are as follows:
Note:
- African, Antarctic, Eurasian, Indo-Australian, North American, Pacific, and South American plates are the seven main oceanic plates. The Pacific Plate, which occupies 39,768,522 square miles and is the world's largest plate, shaped the Hawaiian Islands.
- However, in continental plates there are three types of tectonic plates: major, minor, and Nano. African, Antarctic, Eurasian, Indo-Australian, North American, Pacific, and South American plates are the seven main plates.
i) Divergent plate borders are what give rise to oceanic plates. Upwelling magma produces fresh oceanic crust in these areas, which are found around mid-ocean ridges. Extrusive igneous rock is produced as lava spills from these volcanic ridges and cools rapidly.
ii) Continental plates are when the majority of plate displacement is caused by thermal convection, which occurs as heat from the Earth's interior allows waves of hot rising magma and colder falling magma to flow, pushing the crustal plates along with them.
Complete answer:
The thickness and composition of the crust of oceanic and continental plates vary significantly. The difference are as follows:
Oceanic Plates | Continental Plates |
Oceanic plates are much thinner than continental plates. | continental plates. are much thicker than Oceanic plates. |
At a convergent margin, an oceanic plate collides with a continental plate, forcing the oceanic plate beneath the continental plate and destroying it. | The continental plates are moved outward and thicken at the convergent margins. |
The oceanic plate melts as it is pulled under the continental plate. This molten substance condenses into magma, which may erupt as volcanoes or solidify under the surface as granite. | Continental plates have a lower density than Oceanic plates. Granite and recycled materials are much thinner than the ocean plates' thick basalt layers. |
Oceanic plates occupy about 71% of the Earth's surface. | Continental plates make up 29% of the Earth's surface. |
Note:
- African, Antarctic, Eurasian, Indo-Australian, North American, Pacific, and South American plates are the seven main oceanic plates. The Pacific Plate, which occupies 39,768,522 square miles and is the world's largest plate, shaped the Hawaiian Islands.
- However, in continental plates there are three types of tectonic plates: major, minor, and Nano. African, Antarctic, Eurasian, Indo-Australian, North American, Pacific, and South American plates are the seven main plates.
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