The ___________________ _ is a boundary separating cold polar air to the north from warm subtropical air to the south, the greatest contrast in air temperature occurs along the ___________________ _.
Fill in the blank with correct word.
Question 2
You are given an upper-level map that shows the position of two jet streams. You would be able to tell which is which, because the subtropical jet stream forms to the ___________________ _ of the polar-front jet.
Fill in the blank with correct word.