What natural phenomenon on earth provides information on the structure of earth's core?

In 1933 the 21st amendment was added to the u.s. constitution, allowing for the manfacture, transportation, and sale of alacoholic beverages in the united states. why was this amendment needed?

Reason i shouldnt turn back if i'm lost in the wilderness need fast

How would i answer this in a exam. orange - sea temperature is over 27 red arrows - tropical storm routes