Category: Miscellaneous

Evolution of Earth

Evolution of Earth’s Atmosphere: The early atmosphere Scientists believe that the Earth was formed about 4.5 billion years ago. Its early atmosphere was probably formed from the gases given out by volcanoes. It is believed that there was intense volcanic activity for the first billion years of the Earth’s existence. The early atmosphere was probably mostly

Evidence of Earth’s layered structure

Evidence of Earth’s Layered Structure Evidence that support the concept of a layered structure of the earth comes from several sources.  First, rock samples taken from great depths do have higher concentrations of Iron and Magnesium in them than average crustal rocs. And second, when the mass and size of the Earth are measured, the

Internal layered structure of Earth

Earth’s Internal Layers The Earth has a layered structure, including the core, mantle and crust. The crust and upper mantle are cracked into large pieces called tectonic plates. These plates move slowly, but can cause earthquakes and volcanoes where they meet. The Earth’s atmosphere has changed over billions of years, but for the past 200 million years it has

Composition and Structure of Earth

Composition and structure of Earth  Earth is a terrestrial planet, meaning that it is rocky body, rather than a gas giant like Jupiter. It is the largest of the four solar terrestrial planets, both in terms of it size and mass. Of these four planets planets, Earth has the highest density, the highest surface gravity

About Earth; the important data

Earth is the third planet from the sun and is the largest of the terrestrial planets in the Solar System in terms of diameter, mass and density. It is also referred to as the World, the Blue Planet and Terra. Home to millions of species including humans, Earth is the only place in the universe

Introduction to Geography and its branches

Geography Geography is the study of the physical features of the earth and its atmosphere, and of human activity as it affects and is affected by these, including the distribution of populations and resources and political and economic activities. In other words Geography is the study of places and the relationships between people and their environments.