Units don't measure things. To measure the weight of a light bulb, you need
some sort of a scale.
Once you have the measurement, you can report it (describe it) using any unit
you choose. Some units may produce numbers that are inconveniently large or
small, and are therefore hard to remember, or write down, or tell to others.
You may be tempted to report the weight of a light bulb in 'grams', but that's
technically not a unit of force. The only proper metric unit of force is the 'newton',
along with its decimal multiples and sub-multiples.
You would use the metric unit "kilograms" to measure the weight of a bag of groceries.
You would use the metric unit "kilograms" to measure the weight of a sack of peaches.
A gram would be an appropriate measure for its mass.
You would most likely use milliters.
The metric unit for measuring human weight is actually the Newton (N). Newton's are a measure of force and weight is the product of the acceleration of gravity and an objects mass. The metric unit for measuring human mass is the kilogram (kg).
You would use the metric unit "kilograms" to measure the weight of a bag of groceries.
You would use the metric unit "kilograms" to measure the weight of a sack of peaches.
A refrigerator would typically be measured in kilograms (kg) in terms of weight in the metric system.
As a potato chip is light weight I would use grams and milligrams.
Mass and weight are two different things: you cannot measure the mass of your weight. That is like talking about the temperature of your height - it makes no sense.
A gram would be an appropriate measure for its mass.
gram
You would most likely use milliters.
The weight of the box would be measured in grams.
A scale
Mass is measured in kilograms.
Every country in Europe uses the metric system, meaning they would measure weight in kilograms, grams, etc.