Our Earth Essay

Our terra firma is made up 78 percent of water system, and rest of it is land. Because of this, there is huge number of living organisms in land as intimately as water. It has plains, plateaus, mountains, valleys, deserts, forests, grasslands, oceans, seas, rivers, lakes etc. As there are various kinds of regions on hide, every region has its own kind of wild life as well as plant life. Earth has undergone a gradual change in its environment through its years of evolution.Our earth and its diverse environment Plateaus, plains and valleysPlateaus A plateau is a large highland area of fairly take land separated from surrounding land by steep slopes. nigh plateaus, like the plateau of Tibet, lie between mountain ranges. Others are high than surrounding land. Plateaus are widespread, and together with enclosed basins they cover about 45 percent of the Earths land surface.Plains plains are broad, nearly direct stretches of land that have no great changes in elevation. Plains are in the main lower than the land around them they may be found on a coast or inland. Coastal plains generally rise from sea level until they meet higher landforms such as mountains or plateaus. inland plains may be found at high altitudes.Valleys A valley is a hollow or surface depression of the earth move by hills or mountains, a natural trough in the earths surface, that slopes down to a stream, lake or the ocean, formed by water and/or ice erosion. Systems of valleys extend through plains, hills, and mountains. Rivers and streams flowing through valleys bolt interior land regions to the ocean. At the bottom of many valleys is fertile soil, which makes tenuous farmland. Most valleys on dry land are formed by running water of streams and rivers.