Dry measurements and wet measurements: why are they different?

[RoboG2]

I've always wondered why wet and dry measurements are different.  I have also messed up when trying to cook something by getting them mixed up.

Oh, and i've got a question for you:  Which weighs more, a pound of rocks, or a pound of feathers?

[tommy]

You must be joking. 

[missioncontrol]

cooking...................

blah............


I just stay out of the kitchen............

unless it's to the fridge to get another 12 oz. cold beer 

[cholin]

I'd say a pound of feathers is MUCH heavier than a pound of rocks!  Rocks are so yesterday   I hope you didnt actually expect people to fall for that   What's the point of this topic anyways lol

[quarterback]

I've always wondered why wet and dry measurements are different.