Composition of earth
>> Friday, October 2, 2009
Earth is a terrestrial planet,meaning that it is a rocky body,rather than a gas giant like Jupiter. It is the largest of the four solar terrestrial planet both in terms of size and mass. Of these four planets, Earth also has the highest density, the highest surface gravity, the strongest magnetic field and fastest rotation, It also is the only terrestrial planet with active plate tectonics.
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Compound | Formula | Composition |
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Continental | Oceanic |
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SiO2 | 60.2% | 48.6% |
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Al2O3 | 15.2% | 16.5% |
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CaO | 5.5% | 12.3% |
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MgO | 3.1% | 6.8% |
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FeO | 3.8% | 6.2% |
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Na2O | 3.0% | 2.6% |
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K2O | 2.8% | 0.4% |
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Fe2O3 | 2.5% | 2.3% |
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H2O | 1.4% | 1.1% |
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CO2 | 1.2% | 1.4% |
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TiO2 | 0.7% | 1.4% |
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P2O5 | 0.2% | 0.3% |
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Total | 99.6% | 99.9% |
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