________ are waving undulations within the upper-air westerly ...

[PhilipSeeMore]

________ are waving undulations within the upper-air westerly wind flow
 
  A) Hadley cells
  B) Rossby waves
  C) The jet stream
  D) Monsoons

Question 2

Which of the following is true of Earth's orbit about the Sun?
 
  A) It is perfectly circular.
  B) It is elliptical.
  C) It takes approximately the same time for Earth to orbit the Sun as it does for the rest of the planets in the solar system to orbit the Sun.
  D) The orbit does not vary over millions of years.

[olderstudent]

Answer to Question 1

B

Answer to Question 2

B