| Term | Definition |
| Meteorite ALH840010 | This was found in Antarctica in 1984 and presented possible evidence to life on Mars |
| Fossilized Bacterium | The bacteria that was believed to be found in the Meteorite that was said to be 4.5 billion years old |
| Mars | This planet is the most similar to our earth out of any planet in this solar system |
| NASA | National Aeronautics and Space Administration |
| David McKay | The scientists that discovered Meteorite ALH840010 were led by this man |
| Atmosphere | The envelope of gas surrounding Mars that is slowly thinning |
| Mars has a _____ surface that would make it easier for life to thrive. | Rocky |
| Mars' Temperature | Too cold for water to sustain, yet very similar to Earth's. |
| Why isn't there life on Mars? | The atmosphere is too thin for life on Mars. |
| True or False: The meteorite has has bacterium on it. | False |