bmi activity level

The molecules of various chemical substances in a specific proportion become organised into protoplasm - the physical basis of life. The protoplasm gets organised into cells, which represents the structural and functional unit of life. A living organism may have a single cell (unicellular) or many..

Fluids Pressure Upthrust and Flotation..

Change in the composition of air due to several human activities has brought about green house effect. Green house effect has brought about following phenomenal changes. The severity of these changes will aggravate further in the next 10-20 years. By 2040, CO 2 level in a..

. These animals utilize this energy for their own metabolic activities. Here again some of the energy is released as heat. When primary consumers are eaten by secondary consumers, the same process is repeated at every step of the food chain. Here it must be remembered, that energy release..

Transport - Transport facility created for the convenience of human beings is a great source of air pollution as all the transport vehicles burn some kind of fuels and emit dangerous gases. The extent of gases produced by an individual vehicle may be less. But, when large number of vehicles are use..

Sewage treated in primary treatment is brought in contact with oxygen and aerobic micro-organisms. They break down the organic matter into harmless materials as CO 2 and H 2 O. Further, chlorination is done to reduce the bacteria. It may be further treated to tertiary level zero measure..

"Pyramid of energy is a graphic representation of the amount of energy trapped per unit time and area in different trophic level of a food chain with producers forming the base and the top carnivores at the tip". Pyramid of Energy in a Food Cha..

The Greenhouse effect is the rise in temperature that the Earth experiences because certain gases in the atmosphere (referred to as greenhouse gases), trap energy from the Sun. Without these gases heat would escape back into space and living on Earth would be inhospitable with average temperature b..

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Energy is the capacity to do work. Solar energy is transformed into chemical energy by the process of photosynthesis, and is stored in plant tissue and then transformed into mechanical and heat forms during metabolic activities. The energy, in the biological world, flows from the sun to p..