Its height (above mean sea level): metres
Its length: kilometres - or metres if it is a really short trail.
A microgram.
kilometre
Tonnes
It would be millimetres.
Kilometers
You would use meters. Or, if the trail is more than 1000 meters, you can use killometers
Metres
A microgram.
Potatoes are sold by the kilogram.
A thermometer.
distance
Centimeters
kilograms
you would measure it in kilograms
metric unit
You would use a ruler and measure in millimeters or centimeters.
The answer is a meter!!!!!!!!!!!