What is atmosphere?
Besides atmosphere, what other conditions are necessary to sustain life?
Check out Microsoft Encarta on CD-ROM to define and understand this.
Formation & Dynamics of Earth-like Planets.
Explore the dynamics and creation of planets and relate to our on planet.
Planetary Data System Imaging Node
images to use.
Conditions for Life
Searching for Life In Our Solar System
" in Magnificent Cosmos by
(May 31, 1998).
Ask a Scientist
about Geological Forces of our Earth and the relationship to conditions necessary to sustain life. URL: