Across
- 2. the part of a planet necessary to support a biosphere
- 5. can be used to test ideas that would otherwise be impossible
- 6. Mr. Scott is going to be a…
- 8. we would have evidence Mars could have been habitable in the past if the channel was made by (2 words, no space between them)
- 10. a set of interacting parts forming a complex whole
Down
- 1. made by flowing water or flowing lava
- 3. having the conditions necessary to support life
- 4. a feature that forms on the surface of a planet, such as a mountain, channel, or sand dune
- 5. can be used to make something simpler and easier to understand
- 7. can be used to show ideas and explain your thinking
- 9. the part of a planet that can provide evidence of its past