Common Terminologies of Disaster Management
COMMON TERMINOLOGIES Disaster Management: The body of policy and administrative decisions and operational activities which pertain to the various stages of a disaster at all levels. Risk: The…
Introduction to Disaster Risk Management
Introduction to Disasters Disaster is an extremely fundamental phenomenon in human history. Disaster is a sudden, calamitous, and horrific event that causes great damage and destruction and poses a risk…
Chemical Properties of Minerals
Each mineral has a crystalline structure and almost a definite chemical composition. The properties, which are related directly to the chemical composition of minerals, are isomorphism, polymorphism, and pseudomorphism. Each…
Silicate Minerals, Structure and Properties
Silicate Mineral Structure The Silicate minerals group is of great importance because they constitute about 90% of the Earth’s crust. They are found in all the common rocks except limestone.…
Physical Properties of Minerals
Physical Properties of Mineral One can readily determine the physical properties of the minerals merely by inspection or simple tests. Because the physical properties are determined in hand specimens, they…
What are Minerals?
A mineral is a naturally occuring homogenous substance, which has a more or less definite chemical composition and definite atomic structure. The minerals are usually formed by inorganic processes. They…
Introduction to the Solar System
Solar System Solar System and Planets of the Solar System are of greater importance in science studies. The Earth on which we live, and the only known abode of living…
What is Geography? Fields of geography and its scope
What is Geography? Geography is a fundamental branch of Earth Science, that deals with the study of physical features, natural processes of Earth, population, environment, and relationships among people. Geography…
Theories about the origin of the Earth| How Earth came into existence
The Earth came into being around 4.54 billion years ago. In general, the theories about the origin of the Earth and Solar System can be divided into two groups: (i)…
How old is our Earth| How do we know the age of the Earth?
Age of the Earth The age of the Earth as determined by the current method of radiometric dating is about 4600 million years. Before the discovery of radiometric dating, several…