it's neither created or destroyed
Today the Earth's atmosphere is being destroyed by all the pollution by cars and power plants.
The Earths core is defiantly slowing down but by how much? The Earths rotation speed has slowed by 2 milliseconds since 1820
The thickness of the Earth's mantle is about 2900 km and it's upper boundary is about 100km deep. There is a really cool cutaway drawing available by using the Wikipedia link.
As the old crust enters the mantle it brings volatiles such as water with it. This lowers the melting point of the rock around it.This melted material rises to the earths surface under pressure along with gases and may erupt in a volcano.
A depression on the surface of the Earth created by groundwater is known as a cone of depression.
A crack in Earths's crust along which rocks move. It is created by a transform boundary.
The Earth's crust is destroyed when subduction occurs.
By pushing, pulling, and by sliding.
Plate boundaries.
magnetosphere.
Earths atmosphere? 300 miles. There is no definite boundary.
magnetosphere.
plate tectonic
The worlds tectonic plates slide on the earths mantle.
During a volcanic eruption or on a constructive boundary
In a divergent plate boundary
Other Earths was created in 2009.