Re: Weight
I disagree. When people say something "weighs" 1kg, they are making a statement about how much of it there is. That's what's important when, e.g., baking a cake or doing the shopping.
Scales will of course be calibrated to local gravity (as happens here on Earth, gravity is not the same - 1kg in, say, Greenland is about 0.5% heavier than that same kg in Ecuador). But it's still "1kg".
On the Moon, I'm guessing 1lb is quite a bit more than 1kg.