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Simple- Convection in the mantle causes mantle to slowly move, and it pushes against the crust. As it does this, the tectonic plates move.

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When land masses on earths crust are moving what is it called?

earthquake


How and why does the earths crust vary from place to place?

The earths crust its 5-70km deep in the ocean and upto 100km deep at mountain ranges. At certain areas, the crust is unstable due to moving plate tectonics.


How and why does the earths crust varies from place to place?

The earths crust its 5-70km deep in the ocean and upto 100km deep at mountain ranges. At certain areas, the crust is unstable due to moving plate tectonics.


Are some parts of the earths crust moving up to 12 cm per year?

yes


What is erupted from a volcano?

Well usually its always lava or magma from te earths crust.


What is the size of the earths crust?

The Earths crust is approximately 650 km deep.


Where is most of the earths new crust found?

Most of Earth's new crust is found along mid-ocean ridges, underwater mountain ranges where tectonic plates are moving apart. This is where magma rises from the mantle to create new crust through volcanic activity.


Why does the earths crust stay the same size?

The amount of crust present on Earth always stays the same. The amount of crust descending into the mantle is balanced by the amount of crust formed at mid-ocean ridges.


Why volcanoes are commonly found of the edges of earths moving plate?

This is where the weaknesses in the earths crust lie and it is the easiest place for lava to spew out of these weaker areas, therefore forming volcanoes


What is the moving portion of earths crust and upper mantle?

The moving portion of Earth's crust and upper mantle is known as the lithosphere. It is broken into tectonic plates that float on the semi-fluid asthenosphere below, causing them to move and interact with each other, which leads to processes like earthquakes, volcanic eruptions, and mountain building.


Why did Chiles earthquake happen?

it happened because of plate teutons know as the earths crust ( witch is always moving ) moved so quickly agents each other casing friction witch made the earth shake


What are volcanoes and what causes them?

a volcano is a rupture or opening in the earths crust. caused by convergent (coming together) or divergent (moving apart) plates