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energy from water or hydropower hydroelectricity is the energy produce from the kinetic energy of water
advantage of solar energy1. it is renewable it produce comes from sun so it is plentiful and will always be there as
it is an inexhaustible and population free source of energy. this energy maintains temperature of the earth. it causes current in the atmosphere and
capacity to do work is known as energy. it is very important input for all our activities like cooking food driving vehicle and running industries.
the effects of unlimited population growth are as follows1. increase in unemployment.2.
some of the reason for increase in population is1. decline in death for an increase in life expectancy or
in 1798 british economist and demographer thomas robert malthus published his essay on population in which he stated that1. population
increase in population size is known as population growth. it depends upon number of persons added to the population and number of persons lost from
introduction the term population is derived from lation word populus meaning people. population is a group organism of same in a particular is at a
diversity is defined as the no of species present in a community termed as species richness. we can represent species biodiversity at different
conservation of biodiversity is very important to maintain the ecological balance of ecosystem.various steps for conservation of
these are some important uses of biodiversity.1. source of food medicines and drugsa wheat rice and maize are three
i genetic bio- diversityall forms of life on earth contain genes. genes are carrier of hereditary characteristic from one
the capacity to do work is known as energy. in an ecosystem energy flows through one organism to another in the form of food. the flow of energy is
phosphorus cycle is sedimentary cycle because it does not enter into atmosphere. it can be found on earth in water soil and sediments. the phosphorus
sulphur is one of important of proteins vitamins and hormones. it plays a very crucial role in health of both plants and animals. most of earth
carbon is important constituents of all organic compounds. it forms 49 of dry weight of the organisms. earth atmosphere contains 0.03 carbon
water is an essential commodity for survival of life on these plants. the circulation of water and moisture between living organism atmosphere and
the cyclic exchange of nutrient material between organisms and non-living environment is called biogeochemical cycle geo means earth chemical
an ecosystem is a self sufficient interacting system in the biosphere. eg. forest desert pond etc. almost all the ecosystem have more or less similar
ecosystems main functions are physical chemical and biological processes. which is required for if maintenance of ecosystem. some important
an ecosystem consists of two types of componentsa abiotic componentsthis includes the non-living components of the ecosystem. these are
ecosystems are so varied in form and structure that whatever has a distinct community of its own can be called an ecosystem eg. a crop field grass
the terms ecosystem was introduction by sir arthur tensely in 1935. an ecosystem can be defined s a structural and function unit of biosphere