Cold, dry air affecting the northern united states in winter often comes from
a. maritime polar air masses.
b. maritime tropical air masses.
c. continental polar air masses.
d. continental tropical air masses.

What is the primary justification of the hypothesis that the early earth environment was void of oxygen? ( 2 points) data showing the concentrations of gases extracted from rocks fossil evidence regarding the origin of eukaryotes generally accepted atmospheric conditions molecular evidence based on evolutionary traits.

[bws.05]where would uncharged particles be most likely found in an atom? o on the electrons o inside the protons o inside the nucleus outside the nucleus

The blue segment below is a diameter of oo. what is the length of the radius of the circle?