Duplicate of Plate Tectonics

The Earth has this many layers:

This type of crust is least dense and thickest:

Convection Currents are found in this layer:

True or False: The United States is currently moving West.

This is the outermost layer of the Earth:

This layer is least dense:

This part of the Upper Mantle contains convection currents:

This location sits on a hot spot:

The Continental Drift Hypothesis was first proposed by:

When two plates are moving toward each other, it is this type of boundary:

The idea that the continents are drifting around on Earth's surface was first called the:

Rift Valleys are found at this type of boundary:

Tectonic Plates are made of this:

This part of the upper mantle combines with the crust to make the:

Wegener proposed that the continents were once joined in a large land mass called:

This is a type of plate boundary (where two plates meet):

When a plate descends or drops into the mantle, it is known as this:

Two plates sliding past each other (like in California) is this type of boundary:

This is the inner-most layer of the Earth:

This type of crust is the most dense and thinnest:

Mountain Ranges like the Himalayas (Mt. Everest) are made at this type of boundary:

This layer is most dense:

The Mid-Atlantic Ridge is this type of boudary:

This layer is made of liquid Iron and Nickel: