Sound travels fastest through a) space. eliminate b) cool air. c) warm air. d) a metal spoon.

children tend to take more after their grandparents more than their parents. it’s the dna you received that was passed down to you somewhere in your family. maybe one of your grandparents had/has straight hair and you might have gotten it from them.

i'd say that the moon rock is about 2.2 billion years old.