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