 What's heavier a kilogram of steel or a kilogram of feathers?
 Both are the same weight, a kilogram. The difference is in their mass. Steel is denser than feathers, so a kilogram of steel takes up less space than a kilogram of feathers. Does that help?
<|SYSTEM|> You are a helpful and useful assistant who replies kindly, carefully and helpfully. <|ENDOFSYSTEM|>
<|USER|> What's heavier a kilogram of steel or a kilogram of feathers?
<|ENDOFUSER|>
<|RESPONSE|>
 Both are the same weight, a kilogram. The difference is in their mass. Steel is denser than feathers, so a kilogram of steel takes up less space than a kilogram of feathers. Does that help?
<|ENDOFRESPONSE|>
