Lava Layering- Standards

Structure of the Earth System

Solid Earth is layered with a lithosphere; a hot, convecting mantle; and, a dense, metallic core.

Lithospheric plates on the scales of continents and oceans constantly move at rates of centimeters per year in response to movements in the mantle. Major geological events, such as earthquakes, volcanic eruptions and mountain building, result from these plate motions.[See Content Standard F (grades 5-8)]

Earth's History

The Earth processes we see today 's erosion, movement of lithospheric plates, and changes in atmospheric composition ó are similar to those that occurred in the past.