Natural environment
With time, their needs grew and became more varied. It contains a number of gases like oxygen, which is essential for life, dust and water It comprises of the various sources of water and different types of water bodies like rivers, lakes, seas, oceans, estuaries, etc. It is held by the gravitational force of the earth. The Atmosphere protects us from the harmful UV rays from the sun by blocking them out. Human learnt new ways to change their environment according to their needs. They learnt to grow crops, domesticate animals and build houses. Transportation became faster. Changes in atmosphere bring changes in weather and climate. All life makes up the biosphere. It is the zone of the earth where land, water and air interact with each other to support life. Ecosystem What is an ecosystem? All plants, animals and human beings depend on each other. It is essential for all living organisms. The atmosphere is the thin layer of air that surrounds the earth. The lithosphere is an irre...