Thanks to the direct methods of studying the geosphere, we have reached depths of, aproximately:

The property that determines that the densest areas of the earth's crust tend to sink and the less dense to rise is called:

The Richter scale to analyze earthquakes measures:

At what type of plate boundary is new crust created?:

The point on the earth's surface where seismic waves first arrive is called:

The fastest body seismic waves are:

It is true with respect to S waves that:

The earth's magnetic field is originated by the convection currents of the material of:

The geochemical model of the internal structure of the Earth is based on:

The main component of mantle rocks is:

Convection currents in the geosphere are originated because hot material tends to:

Theories that affirm that the continents move are the theories:

The general average value of the geothermal gradient in the earth's crust is:

The Earth's core is made up of:

The evidences of continental drift based on the existence of fossils of identical organisms in places on the planet that are today thousands of kilometers away are:

The evidences of continental drift that are based on the coincidence between the shape of the coasts of some continents, especially between South America and Africa, are:

Mid-ocean ridges are a boundaries of type:

The continental drift hypothesis was proposed by:

The discontinuity, in the internal structure of the Earth, between the crust and the upper mantle is called: