Change is the law of nature. It is a continuous process that goes on uninterruptedly involving phenomena, big and small, material and non- material that make our physical and socio-cultural environment. It is a process present everywhere with variations in terms of magnitude, intensity and scale.
Change can be a gradual or slow process like the evolution of landforms and organisms and it can be as sudden and swift as volcanic eruptions, tsunamis, earthquakes and lightening, etc.
Similarly, it may remain confined to a smaller area occurring within a few seconds like hailstorms, tornadoes and dust storms, and it can also have global dimensions such as global warming and depletion of the ozone layer.