• environmental science

    MCQs on Ecology & Environment

    1. Acid rains are produced by (a) excess NO2 and SO2 from burning fossil fuels (b) excess production of NH3 by industry and coal gas (c) excess release of carbon monoxide by incomplete combustion (d) excess formation of CO2 by combustion and animal respiration. Answer and Explanation: 1. (a): Acid rain refers to the precipitation with a pH of less than 5. It is a mixture of H2SO4 and HNO3, the ratio of the two acids vary depending on the relative quantities of sulphur oxides and nitrogen oxides present in the atmosphere. These oxides are mainly produced by combustion of fossil fuels, smelters, industries, power plants, automobile exhausts etc. 2. Which one is not a pollutant normally?…

  • Biology,  environmental science

    The Water Cycle

    Water cycle: a continuous pattern in nature in which water moves as it changes state above, on, and below the surface of Earth.Water is the only substance that exists on Earth in each of its three states. Water easily changes from one state to another. Water sometimes changes its location by changing state in a continuous pattern called the water cycle. The water cycle is self-renewing and constant. The Sun provides the energy to power the water cycle.Changes of StateWhen water changes state in the water cycle, the total number of water particle remains the same. The changes of a state include melting, sublimation, evaporation, freezing, condensation, and deposition. All…

  • environmental science

    The Multidisciplinary Nature of Environmental Studies

    Definition Environmental studies deal with every issue that affects an organism. It is essentially a multidisciplinary approach that brings about an appreciation of our natural world and human impacts on its integrity. It is an applied science as it seeks practical answers to making human civilization sustainable on the earth’s finite resources. Its components include biology, geology, chemistry, physics, engineering, sociology, health, anthropology, economics, statistics, computers and philosophy. Scope As we look around at the area in which we live, we see that our surroundings were originally a natural landscape such as a forest, a river, a mountain, a desert, or a combination of these elements. Most of us live…

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