Science
posted by Sonic .
Which is the best unit for measuring each mass? mg = milligrams g = grams kg = kilograms
a. Amount of spices in a batch of cookies: mg g kg
b. Your mass: mg g kg
c. Mass of 10 pennies: mg g kg

Thank you for using the Jiskha Homework Help Forum. Here is what scientists say:
http://everything2.com/index.pl?node=room%20temperature 
A kg is about 2.2 pounds. Here are the other relations.
The metric system has prefix modifiers that are powers of 10.
A kilogram is 1000 grams
A hectogram is 100 grams
A decagram is 10 grams
A gram is the basic unit of mass
A decigram is 1/10 gram
A centigram is 1/100 gram
A milligram is 1/1000 gram
I hope this helps you come to your own answers. Thanks for asking. 
Mg