Astrobotany

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Across
  1. 2. to dry in a frozen state under high vacuum
  2. 4. staying alive and safe
  3. 6. units of energy in food that act as fuel
  4. 9. invisible energy provided by the sun
  5. 10. oxide a compound made when iron joins with oxygen
  6. 11. security ability to provide food needed for survival
  7. 12. the study of plant growth in outer space
Down
  1. 1. to remove water from
  2. 3. imitating a real-life situation to understand it
  3. 5. a balanced, nutrient-dense diet
  4. 7. capable of continuing over time
  5. 8. sunny "house" for plants that helps them grow even in winter