Unit 2: The Dynamic Earth (Reflective Journal)

Running Head : DYNAMIC EARTH

The Dynamic Earth

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Introduction

The Earth and the moon are partners in space but are two very different worlds (Oxlade , 2008 . The Earth is now the only terrestrial planet with : abundant liquid surface water , a requisite for life an atmosphere rich in oxygen bimodal topography (low ocean basins and high continents a strong magnetic field which protects from solar radiation and preserves the atmosphere and a large moon , keeping

the Earth 's orbit and therefore its climate stable (Elkins-Tanton , 2006 . Its density is about 5 .5 g /cm3 overall . The Moon , in contrast , is almost perfectly dry , no currently active volcanism , no atmosphere and no life Its average density is 3 .34 g /cm3 . Its ancient surface is formed by the impacts and by constant flux of solar wind . Since it is unprotected by any significant magnetic field , it now stands virtually changeless in human time scales (Elkins-Tanton , 2006 , making it more useful for scientists who study the Earth as well . It is important for people to understand the behavior and movement of the Earth , as well as the processes that occurs in it

The Dynamic Earth

The Earth is constantly changing . It may undergo different processes that occur naturally , or may undergo stresses from external factors brought about by human and other living organisms . Such changes and processes are studied by scientists mainly by the use of rocks . The...