<Tr> <Td> Soil moisture </Td> <Td> 1 to 2 months </Td> </Tr> <Tr> <Td> Groundwater: shallow </Td> <Td> 100 to 200 years </Td> </Tr> <Tr> <Td> Groundwater: deep </Td> <Td> 10,000 years </Td> </Tr> <Tr> <Td> Lakes (see lake retention time) </Td> <Td> 50 to 100 years </Td> </Tr>

What are the four forms that water takes when it returns to earth from the clouds