Kilograms (kg) are appropriate if you measure weight using the metric system. If using the English system of measurement, pounds (lbs) is acceptable.
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No.
A kilogram is a measure of mass, not of weight. The correct unit for measuring the weight of a person is a Newton. On the surface of the earth, a mass of 1 kg has a weight of approx 9.8 Newtons. Your weight would reduce to zero Newtons in outer space but your mass would remain unchanged.
That's true but common use is "weight" to mean "mass", and you won't change that in a hurry. What matters is using the correct units when genuinely necessary. It's only recently, with the advent of the SI version of the metric system, that the distinction has raised its pedantic head; and then only in technical work, not common use including most trade.
The English system in its own country uses Stones and Pounds to weigh a person, not just lb.; and bathroom scales are calibrated in these, with a concentric kg equivalent.
1 Stone = 14lb. 1kg = 2.2lb (approx)
The most appropriate metric unit to measure the mass of a concrete block is kilograms (kg).
The appropriate metric unit to measure the mass of a lawn mower would be kilograms (kg). This unit is commonly used for measuring the weight of objects in metric system.
The metric unit used to measure the mass of a pencil would be grams (g).
The metric unit used to measure the weight of a snail is grams (g) or milligrams (mg).
An appropriate metric unit for the mass of an eyelash would be milligrams (mg) because eyelashes are extremely light and measure in the milligram range.
The most appropriate metric unit to measure the mass of a concrete block is kilograms (kg).
The appropriate metric unit to measure the mass of a lawn mower would be kilograms (kg). This unit is commonly used for measuring the weight of objects in metric system.
The metric unit used to measure the mass of a pencil would be grams (g).
An appropriate metric unit of mass for a pencil would be grams.
The metric unit used to measure the weight of a snail is grams (g) or milligrams (mg).
An appropriate metric unit for the mass of an eyelash would be milligrams (mg) because eyelashes are extremely light and measure in the milligram range.
You would use kilograms (kg) to measure someone's mass in metric units.
The best metric unit to measure the mass of an elephant would be kilograms (kg). This unit is commonly used for larger objects like elephants due to their substantial weight.
You would use the metric unit "kilograms" to measure the mass of a wardrobe.
GRAMS
Tonnes
You would use grams (g) to measure a flower's mass.