Tectonic plates refer to the entire rigid outer layer of the Earth, which includes both the crust and the uppermost part of the mantle. This layer is broken into large pieces that move and interact with each other, causing earthquakes, volcanoes, and mountain formation.
Crustal plates specifically refer to the outermost layer of the Earth, which is the crust. There are two types of crust:
* Oceanic crust: Thinner and denser, made of basalt and gabbro.
* Continental crust: Thicker and less dense, made of granite and other granitic rocks.
So, while both terms are related to the Earth's surface and its movement, "tectonic plate" is a broader term that encompasses the entire rigid layer, while "crustal plate" specifically refers to the Earth's crust.
Here's an analogy: Imagine an apple. The entire apple is the tectonic plate, including the skin and the first layer of the fruit. The skin of the apple would be the crustal plate.
