mg or g
A calorimeter and a thermometer.
A kitchen scale or measuring spoons are commonly used to accurately measure salt in recipes. Alternatively, a salt spoon can also be used for a more precise measurement of smaller quantities.
This measurement is made with a measuring microscope.
meter
odometer
thermometer
The engine dipstick is the only tool you can use to measure how much oil is in the engine.
Barometer is the tool to measure air pressure
Use a tape measure and measure in metres. For greater precision, measure in centimetres.
The best tool to use to measure distance underwater is
A ruler or tape measure.
You would use a thermometer to measure air temperature.