Question

the idea that earths lithosphere is broken up into separate plates that float on the mantle is the theory of​

Answer 1

Answer:

plate tectonics

The concept of plate tectonics was formulated in the 1960s. According to the theory, Earth has a rigid outer layer, known as the lithosphere, which is typically about 100 km (60 miles) thick and overlies a plastic (moldable, partially molten) layer called the asthenosphere.

Explanation:

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Answer 2

The idea that the earth's lithosphere is broken up into separate plates that float on the mantle is the theory of​ plate tectonics.

• The lithosphere, the Earth's exterior crust, is divided into separate plates to move all around the asthenosphere, this same molten top layer of the mantle, according to plate tectonics theory. Oceanic as well as continental plates collide, extend apart, then interact at all of the planet's borders.
• Each plate boundary produces all its set of tectonic processes including landforms. Plates split at different borders, generating a narrow curved surface. Geysers explode with superheated water, while magma, or molten rock, erupts as from the mantle as well as hardens into basalt, generating new crust. Oceanic crust is produced as an outcome of diverging boundaries.