Question

what is the difinition of plate tectonic

Answer 1

You meant “definition of plate tectonics.” Here’s a concise one and a short explanation.

Definition
- Plate tectonics is the scientific theory that Earth’s outer shell (the lithosphere) is divided into several large and small rigid plates that move relative to each other on the more ductile asthenosphere beneath them. Their interactions produce earthquakes, volcanoes, mountain ranges, ocean trenches, and seafloor spreading.

Key points (brief)
- Plates: pieces of the lithosphere that include crust and the uppermost mantle.
- Plate boundaries: divergent (move apart), convergent (move together), transform (slide past).
- Driving forces: mantle convection, slab pull, and ridge push are the main mechanisms that move plates.
- Evidence: matching continental shapes, fossil and rock correlations, seafloor spreading, magnetic stripes on the ocean floor, and global patterns of earthquakes and volcanoes.
- History: built on Wegener’s continental drift idea and developed into a unifying theory in the 1960s.

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