Why does the temperature of ocean water remain relatively constant, despite large fluctuations in air temperature? a) ocean water has a high concentration of dissolved salts b) ocean water has a high specific heat c) ocean water is a major component of organisms d) ocean water exists in the form of water vapor

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

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