Tag: chemical
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Soil as Ecological Factor
Introduction Soil consists of weathered layer of Earth’s crust with products of decay of living organisms intermingled. In soil, thus, abiotic & biotic components are intimate. Soil is considered to be chief organizing centre for land ecosystems. Pedosphere: Outermost layer of earth that is composed of soil & subject to its formation. Pedogenesis: Process of…
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Class 9th – ATOMS AND MOLECULES
Atoms are indivisible particles which cannot be divided further. The Indian philosopher Kanada was the first to call that matter are made up of small particles called Parmanu. John Dalton called matter is made up of small particles called Atom. LAWS OF CHEMICAL COMBINATION: LAW OF CONSERVATION OF MASS LAW OF CONSTANT PROPORTION LAW OF…