Distance or length is measured in metres.
meter
there are many unit which measure volume .SI units that measure volume is cubic meter .
a meter
The SI unit for volume is the cubic meter
The meter is the standard SI unit of length. ( kilometers when longer distances are talked about )
Since density is mass / volume, the natural SI unit is kilogram / cubic meter.
There is not a standard SI unit to measure sphericity.
Length you mean? Length= meter.
The SI unit of area is the square meter (m2), which is a derived unit.
cubic meter, m3
Identify the SI until you would use the measured the width of your classroom
Yes, the meter is the basic SI unit of length.The metre is one of the seven BASE (not 'basic') units that make up the SI system. So, the meter is the base unit for length in the SI system.