ounce - oz

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A slice a bread weighs about 1 ounce.

 pound - lb

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A loaf of bread weighs about 1 pound.

1 pound = 16 ounces

ton

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A car weighs about 1 ton.

1 ton = 2000 pounds

 gram - g

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A packet of sugar weighs about 1 gram.

kilogram - kg

A book weighs about 1 kilogram.
A car weighs about 1000 kilograms.

1 kilogram = 1000 grams
Units of Mass
   
10 milligrams (mg) = 1 centigram (cg)
10 centigrams = 1 decigram (dg) = 100 milligrams
10 decigrams = 1 gram (g) = 1000 milligrams
10 grams = 1 dekagram (dag)
10 dekagrams = 1 hectogram (hg) = 100 grams
10 hectograms = 1 kilogram (kg) = 1000 grams
1000 kilograms = 1 megagram (Mg) or 1 metric ton(t)