1 kilometer is about ½ mile.
1 meter is about 1 yard
1 centimeter is about ½ inch
1 millimeter is about 1 dime thick
1 kilogram is about 2 pounds
5 grams is the weight of a nickel
1 gram is 2 small paperclips
1 liter is about 1 quart
1 mL is about 20 drops
Thanks to Ms. Brenda Remus of Lee High School, Huntsville, AL