Which statement about North America is true? a. Much of it is rain forest.
b. The seasons are the opposite of South America's.
c. It has no major urban centers.
d. Its highest mountains are on the East Coast.

Ascientist is explaining how background cosmic radiation gives evidence of the big bang theory. she says that radiation has been detected everywhere equally as heat in the universe and is increasing. this has been shown to be residual radiation from the big bang. what error did the scientist make?

Soil is made of air water organic material minerals weathered rock

The desert expands by hundreds of square miles each year.