How heavy something is, or how much does it weigh.
The SI unit for mass in the metric system is the kilogram.
The gram is a metric unit of mass.
If, by 'metric system', you mean 'SI system', then the base unit for mass is the kilogram
the answer is it is the definition of the system of units between metric units and compound system of economy
In the SI - the current metric system - that would be the kilogram. In older metric systems, the gram has been used as the unit of mass.
(g) grams- is the unit used in the metric system.
Mass is measured in kilograms.
The unit of mass is the kilogram.
it is a gram
Matter is defined as that which has mass and occupies space. There are procedures to measure both. Even if you can't measure the mass of an object directly (such as a gas), you can still determine it's mass by measuring the space it occupies. Pressure is one way to measure the mass of gas by the amount of space it occupies.
The kilogram is the Base Unit (not 'basic' unit) in the SI system (not 'metric system') for mass.
English: pound. Metric: kilogram.