You should use the "math book" to look up the answer to this question as opposed to just having someone answer it on this website.
Either a ruler or a scale.
Unit of Measurement used when measuring Weight or Mass
The best unit is a litre.
The best unit for measuring the length of a pencil is inches.
Gram
For a desk like one used in schools the best unit would be pounds. Good luck on your measuring!
inch
A millimetre.
centimetres
pounds
kilograms
The best unit of measure to use when measuring the amount of water in a drinking glass is ounces. A liquid measuring cup can be used to measure the ounces of water.