Name: ________________________ GIVEN 10/01 ID number: ________________________

Quiz 6. Planetary Atmospheres

Of the five terrestrial planets (including the Moon), how many have some kind of atmosphere? List the planets which do, starting with the one which has the most atmosphere, and ending with the one with the least. Then describe the factors which determine if a planet is able to keep an atmosphere, and explain why some terrestrial planets have no atmosphere.

Joshua E. Barnes (
Last modified: September 30, 1999