Essay on the phenomenal achievements of Earth Summit. In 1992, in Rio – de – Janerio, the largest international gathering took place which brought 108 heads of State and Government at one place where they endorsed Agenda 21..
The Bible says that this beautiful Earth on which we live was created by God for Adam and Eve to live in and those we are the descendants of Adam and Eve. For centuries many philosophers in the East and in the West including the Greek philosopher Aristotle believed that earth is the centre of this universe.
The formation of earth took place as a cold aggregate of planetesimals. These were mainly made of compounds of silicon, Iron and magnesium with traces of other elements. As more and more planets collided …
Life is a dynamic physio-chemical functional system and it starts when a cell is formed. The basic issue of evolution is chemical evolution and its product. The problems of molecular evolution and origin of life is called biogenesis and bioprocess or protobiogenesis respectively.
Solar energy received by the earth is distributed over a large area near the poles than at the equator. Thus, the amount of energy received per unit area is more at the equator, which is consequently much warmer than the poles.
Earth is the home of all living things. Life is possible on it because it has air and water. Thousands of years ago, man believed that the Earth was flat and surrounded by sea.
The planets are the most important members of the sun’s family. There are nine planets in the solar system, which are revolving round the sun almost in the same plane these planes in order of increasing distance from the sun are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto.
The region of the earth immediately under the lithosphere is the mantle. The upper region of the mantle contains molten rocks and gases. These molten rocks containing gases are known as magma.
The earth, just like other planets was probably formed by aggregation of large number of smaller bodies called planetesimals. In the region occupied by inner planets, Mercury, Venus, Earth and Mars the planetesimals were made up of mostly iron, and rocky substances.
A cover of gases surrounding the earth is called the earth’s atmosphere or simply as atmosphere. Atmosphere extends from the earth’s surface to about 1000km. But about 99% of the atmospheric air is present without 40 km from the earth’s surface.