Activity 1: Life, A Long-Term Observation
Activity 2: Defining Life
Activity 3: Identifying Life
Activity 4: What Does Life Need for Survival?

Science on the Internet

Explore Earth Images
NASA Earth from Space - Astronaut Acquired Images
Terraserver.com - various options for satellite images
Google satellite images

Astrobiologists and Defining Life
Idaho National Laboratory - Chemical Guidebook to help Rover track extraterrestrial life
Astrobiology Magazine - Defining Life
NASA Astrobiology - Defining Life

Mars Missions and Life
Space.com - Scientists Say Mars Viking Mission Found Life
Astrobiology Magazine - Mars Missions and Life
Space.com - Rover Report Card: Prospect for Life More Likely