How do the different layers of the atmosphere benefit the earth?

Which summarizes the relationship between density of an element and its distribution in earth? a. the greater an element’s density, the greater the amount of it found in the crust. b. the denser an elements is, the smaller the amount of it earth core. c. the greater an elements density, the smaller the amount of it’s found in the crust

Why did macarthur want to invade china? why did truman oppose this?

This word for a bug or malfunction was popularized in the 1962 book into orbit by the mercury astronauts