the properties of life on earth

Earth is the only planet in our solar system, which is surrounded by oxygen, the life giving gas. It is the only planet to have large quantities of water. Earth's atmosphere contains oxygen, nitrogen, carbon dioxide and water vapour. Earth Earth is ..

Summary - Earth is said to have been formed about4.8 billion years ago. Earliest earth was a hot revolving ball of gas. The formation of first cells in planet earth is explained by the theory of chemical evolution proposed by Oparin and Haldane, independently. Accordin..

As alkaline Earth metals have low ionization energies and high electropositive character, they are very reactive and have a strong tendency to lose valence electrons, though less than alkali metals. The reactivity of these elements increases on going down the group. The chemistry is gover..

United Nations has recently taken up an exciting new programme named "earth watch". It will provide monitoring, research, evaluation, control and exchange of information about the world environment. Inspite of many laws biodiversity is not conserved and wild life is suffering lo..

The Earth's Magnetism - A magnetic compass was used to help the sailors for navigational purpose. But recently it has been discovered that some migrant birds have magnetic sensors in their heads, which help to guide them using the Earth's magnetic field. William Gilbert suggeste..

Origin of Life - Philosophers and scientists from time immemorial have attempted to explain how and where life originated on this planet earth. Today, earth is the only planet where life exists. However, when the earth was formed about 4.8..

Philosophers and scientists from time immemorial have attempted to explain how and where life originated on this planet earth. Today, earth is the only planet where life exists. However, when the earth was formed about 4.8 billion years ago, ..

Philosophers and scientists from time immemorial have attempted to explain how and where life originated on this planet earth. Today, earth is the only planet where life exists. However, when the earth was formed about 4.8 billion years ago, t..

Some physical characteristics of carbon dioxide are given below M.P B.P. Density (273K) CO bond length D Hf 216.4 K 194.5 K 1.977 g/L 116.3pm -393.5kJ/mol(5.2 atm) (Sublimes) CO 2 is a colorless gas with a faint pungent smell. It is about 1.5 times heav..

Properties of earth materials Objects in the sky Changes in earth and sk..