<Tr> <Th> Quantity </Th> <Th> Dimension </Th> <Th> SI unit and symbol </Th> <Th> Legacy unit and symbol </Th> <Th> Conversion factor </Th> </Tr> <Tr> <Td> Time </Td> <Td> </Td> <Td> second (s) </Td> <Td> second (s) </Td> <Td> </Td> </Tr> <Tr> <Td> Length </Td> <Td> </Td> <Td> metre (m) </Td> <Td> centimetre (cm) ångström (Å) </Td> <Td> 0.01 10 </Td> </Tr> <Tr> <Td> Mass </Td> <Td> </Td> <Td> kilogram (kg) </Td> <Td> gram (g) </Td> <Td> 0.001 </Td> </Tr>

What are the three specific base units of measure for length volume and mass of the metric system