Weight for elephants could be measured in tons or pounds. For metric, weight is measured in newtons. For mass, you can use kilograms or tonnes (metric ton equal to 1000 kg). Pounds mass is possible, too.
Grams
You can check the Wikipedia article on "SI units".
Miligram
Cups
Webster's New Collegiate Dictionary contains a table of Weights and Measures on the same page it defines weight; in my copy page 1319
Milligrams, usually.
your-mum-tonnnes
While a pound is a measurement of weight, a quart is a measurement of volume. The density and size of an item would be needed to find the weight of a specific volume.
Units of weight or mass for a book would be in pounds and ounces or grams and kilograms.
Trunk Size Tusks
Africa
A micrometer is the unit of measurement to find the diameter of the lung alveoli.
Ano Nuevo state reserve
Africa!! or perhaps a zoo.
You can check the Wikipedia article on "SI units".
They are 9-12 inches but i will search aroun the net and find weight be back soon
newtons is a measurement of weight where as meters is a measurement of length they can not be measured into each other in other words the porblem is impossible to find an answer to
Square centimetres