7. | The meridian passing through London is called the | |||||||
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8. | The most recent era of the geological time scale is | |||||||
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9. | The low heating capacity of which of the types of coal reduces its value as an industrial fuel? | |||||||
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10. | The most important factor that is affecting all the chemical weathering processes is | |||||||
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11. | The longest river in the Common wealth of independent states is the | |||||||
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