You would use a Spirometer.
rain vale
You would use to measure decimeter is a ruler.
A tape measure.
One could use a ruler.
The answer will depend on how big the rock is.
you would use a ruler.
You would rather use 1g
I would use a tape measure to measure a car.
meters
a gram
echo sounder is the most recommended.
Volts
if you used Milimetres to measure a Football pitch it would take Years so you would you something more sensible and higher (Kilometres)
you would use a microdissection instrument
You would use the unit of measurement "centimeters" or "inches" to measure your classmate's height.
The reason is a Kilometer is made up of 1000 metres. For small distances you would use either metres, centermetres or milimetres