Plate tectonics is the theory that Earth's lithosphere, the rigid outermost layer, is divided into several tectonic plates that move relative to each other.

The three main types of plate boundaries are convergent boundaries, divergent boundaries, and transform boundaries.

At a convergent boundary, two plates collide, causing one plate to be subducted beneath the other.

At a divergent boundary, two plates move away from each other, causing new crust to be formed.

At a transform boundary, two plates slide past each other, causing earthquakes.

The Pacific Plate is the largest tectonic plate, covering about one-third of the Earth's surface.

The Juan de Fuca Plate is the smallest tectonic plate, covering about 2.5 million square kilometers.

Pangea was a supercontinent that existed about 250 million years ago.

Pangea Ultima is the name of the supercontinent that is predicted to form in the future.

Subduction is the process by which oceanic crust is recycled back into the mantle.

Challenger Deep is the deepest point in the ocean, located in the Mariana Trench.

Mount Everest is the highest mountain in the world, located in the Himalayas.

The Andes Mountains are the longest mountain range in the world, stretching for over 7,000 kilometers along the western coast of South America.

The Pacific Ocean is the largest ocean in the world, covering about one-third of the Earth's surface.

The Arctic Ocean is the smallest ocean in the world, covering about 14 million square kilometers.