Answer:
I am a type of weapon for SCI-FI characters
I am the thing that is used to make your weight. What am I?
I have cities without people forests without trees and oceans without water. What am I?
I am black, white, and read all over. What am I?
What can fill a room but takes up no space?
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.