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Why does marble rarely contain fossils?This is due to of the way that it is formed. When you have a rock that is formed bymetamorphosis then it has been created by heat and pressure acting on other rocks.Fossils are inherently delicate things and thus precious little would withstand the conditions that are needed to create marble - and thus marble hardly ever contains fossils as a direct result of this.
Infectious diseases: Some of you may have heard about the great bubonic plague, a fatal disease of the blood, spread by fleas and respiratory secretions. It occurred in epid
Functional unit of the nervous system-neuron: The human brain is composed of more than one hundred billion (100,000,000,000 or 1011) cells called 'neurons'. This number which
why sea water have high salinity compared with pond water
Explain Cyanosis - histotoxic hypoxia Cyanosis is a physical sign for causing bluish discoloration of the skin & mucous membranes. Cyanosis is caused by a lack of oxygen in the
How water can be decomposed You will require a six-volt storage battery or accumulator or a battery of six dry cells for this interesting experiment. Take away the insulation f
how to overcome river in chain surveying
Rockets or Launch Vehicles: Every flight into space begins with a rocket launching. The rocket can lift a satellite or spaceship carrying human beings and equipment into space
Photochemical Smog: Photochemical smog, a secondary Pollutant, results when the two pollutants, nitrogen oxide and hydrocarbons found in automobile exhausts, react with
Mercury: Mercury, the planet nearest to the Sun, has long remained a mysterious body. Because .of the Sun's glare, it is difficult to see it clearly all the mare so becau
In hydraulic machines a liquid that has filled a pipe is pushed at one end of the pipe. The liquid then pushes a machine part located at other end of the pipe. Why isn''t gas used
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