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Lithospheric plates.
The Earth's surface is broken into large pieces called tectonic plates. These plates float on the semi-fluid asthenosphere layer beneath them and interact at plate boundaries, where geological phenomena such as earthquakes and volcanic eruptions occur.
The large pieces of Earth's crust that move over the asthenosphere are called tectonic plates. These plates are responsible for the movement of continents and the occurrence of geological events such as earthquakes and volcanic eruptions.
No. Not all plate boundaries are at the edges of continents, nor do all edges of continents correspond with plate boundaries. Many plate boundaries are found in the middle of oceans, while the continent of Africa is being torn apart by a developing plate boundary. Some edges of continents, such as the west coast of South America are near plate boundaries. These are called active continental margins. Others, such as the east coast of North America, are nowhere near plate boundaries. These are called passive continental margins.
The activity of the Earth's moving plates is called plate tectonics. It involves the movement and interaction of large sections of the Earth's lithosphere, resulting in phenomena such as earthquakes, volcanic activity, and the formation of mountain ranges.