Because mass is measured in grams, milligrams, kilograms, etc. and grams is the sensible choice considering kilograms would be a ridiculously tiny number.
Also, grams is the "base" measurement, like a unit of 1. Milligrams would look more like a normal number, but grams compares it to something that weighs, well, one gram, which is a lot more known to us. (ie we can lift an object and say it's about a gram, but it's a lot harder to tell if something is one milligram because you would barely even realize you're lifting something.)
Mass
No, a chair is typically measured in units of length, width, and height (such as inches or centimeters) for its dimensions, and in units of volume (such as cubic feet or cubic meters) for its size. Weight measurements in grams or kilograms are used to measure the mass of objects, not their physical dimensions.
Yes
You use grams to find the mass of an object.
Grams are the measure in this case. A gram is a unit of mass.
Capacity can be meaured in cups. Mass can be measured in grams.
Mass is measured in grams. Pounds are also a unit of mass.
Mass of an object can be measured in kilograms, grams, pounds, or ounces.
Mass can be measured in units such as kilograms (kg), grams (g), pounds (lb), and ounces (oz).
The mass of a ruler would be measured in grams (g).
Grams are one unit in which weight can be measured.
Grams
No, a Joule is a unit of energy. Mass is measured in kilograms (or grams)
Mass is a measure of the amount of matter in an object. It is typically measured in units such as kilograms (kg) or grams (g).
A unit of mass is measured in kilograms (kg) or grams (g).
Mass is measured in (I think) grams or kilograms
Mass is a measure of the amount of matter in an object. It is typically measured in units such as grams or kilograms using a scale.