You would use the metric unit "liters" to measure the capacity of a hot water tank.
You would use kilograms (kg) to measure someone's mass in metric units.
You would typically use the metric unit of centimeters to measure the growth of your hair.
The appropriate measure would depend on whether you wanted to measure its circumference, area, volume, temperature or some other attribute. For this reason, it is not possible to name an appropriate unit.
You would use liters (L) to measure the volume of a soda container in the metric system.
Meters
You would use the metric unit "liters" to measure the capacity of a hot water tank.
You would use kilograms (kg) to measure someone's mass in metric units.
Metres
The appropriate measure would depend on whether you wanted to measure its circumference, area, volume, temperature or some other attribute. For this reason, it is not possible to name an appropriate unit.
You would typically use the metric unit of centimeters to measure the growth of your hair.
Metres.
You would use liters (L) to measure the volume of a soda container in the metric system.
You would use the metric unit "kilograms" to measure the weight of a bag of groceries.
A microgram.
Potatoes are sold by the kilogram.
A thermometer.