>>>Naomi,
>>>
>>>>For water it's 1m*1m*1m = 1kg, if my memory serves me right.
>>>
>>>The original definition of a kilogram = the mass of 1 liter of water at 0 degrees C.
>>WRONG!
>>It's at 4 degrees Celsius! at that temp the water is the lightest. :-)
>
>Not lightest: heaviest, or, more accurately, densest.

Why quible over 0 degrees or 4 degrees if you already have an error with a factor of 1000 !?

1m*1m*1m = 1000 l = (ca) 1000 kg
1dm*1dm*1dm = 1 l = (ca) 1 kg