I learned that earthquake happens when plates called tectonic plates rub together. The make the shell of the earth but  whenever they rub together the surface (where we are) begins to shake and wobble.

 

 

A volcano is an opening in a planet or moon’s crust through which molten rock, hot gasses and other materials erupt. Volcanoes often form a hill or mountain as layers of rock and ash build up from repeated eruptions. Volcanoes are classified as active, dormant or extinct.

 

 

There are also layers of the earth. The crust is the first one. We stand on the crust because it is the ground.

Then we have the mantle which is the mostly solid bulk of the earth’s interior. The mantle is made of  hot, dense, iron and magnesium rock.

Then it is the outer core. It is the 3rd layer of the earth and is the only liquid layer out of them all. It is made by metal, iron and nickel. The outer core is over a billion years old.

Lastly, we have inner core. It is a hot, dense ball of (mostly) iron. The inner core is almost the same size as the moon.

 

Thats IT for now