energy inventions and designs

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Across
  1. 2. To get the new product known we must what?
  2. 5. What is something crucial and natural to observe?
  3. 6. We need to make a new energy inventions that is most what?
  4. 7. How can we experiment?
  5. 8. We must improve more useful forms of what?
  6. 9. How some innovations are small changes to existing tech?
Down
  1. 1. What should we do to answer the question "Should we leave earth?"
  2. 3. What is something crucial to look at when researching other planets?
  3. 4. What are some researchers saying about other planets?