The boundary between the two lies about 465 miles (750 kilometers) beneath the Earth's surface. The crust is the outermost layer of the Earth. It is the familiar landscape on which we live ...

Earth is divided into four layers: the inner core ... which forms the tectonic boundary between the Pacific Plate and the North American Plate. These are known as Transform Faults.

Seismic waves bend and reflect at the interfaces between different materials ... Explain that the Earth is made of three main layers: crust, mantle, and core. Draw them on the board using colored ...

Over time, they noticed that the atmosphere had distinct layers. By the early 1900s ... and over the last 40 years, the boundary between the troposphere and stratosphere has risen about 200 ...

To the Ends of the Earth: The Natural World - Pushing Boundaries is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon Fire ...