Exploring Earth’s Surface Topography and Earth’s Four Spheres
Dec 11, 2015
There are 3 main types of landforms.
Plains are landforms with flat or gently rolling land of low relief.
Mountains are landforms with high elevation and high relief.
A range of mountains is a group of mountains that are closely related in shape, structure, and age.
And now for something completely different…
A plateau is a landform that has high elevation and a more or less level surface (low relief).
Lithosphere
As you know, the lithosphere is the Earth’s solid, rocky outer layer, floating on the liquid mantle.
Atmosphere – The layer of gases surrounding our planet
The outermost sphere is made up of: nitrogen (78%)oxygen (21%)argon (.93%)carbon dioxide (.036%)
…and other trace gases.
Water vapor also plays an enormous role in the Earth’s atmosphere.