How did water form on the earths surface

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Assignment

1). How did water form on the Earth's Surface? Is there more than one theory? Explain

2). Does soil humus act as if it has a positive or negative charge at neutral pH?

3). Explain how volcanic erruptions can cause year long cooling in the mean global surface temperature. Why does the effect of a eruption last do long?

Each question must be answered paragraph form using references and citations.

Reference no: EM131445233

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