Plate boundaries are the edges where two plates meet. Most geologic activities, including volcanoes, earthquakes, and mountain building, take place at plate boundaries.
A tectonic plate (also called a lithospheric plate) is a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere. Plate size can vary greatly, from a few hundred to thousands of kilometers across; the Pacific and Antarctic Plates are among the largest.
Without plate tectonics, our planet would be a very different place. The constant recycling of the Earth's crust provides us with a stable climate, mineral and oil deposits, and oceans with a life-sustaining balance of chemicals. It even gives evolution a kick every few hundred million years.
Learn more about tectonic plates here: brainly.com/question/1162125
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