Biodiesel Adventure Parts 3-4

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Across
  1. 4. an amount of work
  2. 5. the physical state or situation
  3. 11. the process of changing from water to ice
  4. 12. a device used for cooking or heating
  5. 14. valuable or treasured
  6. 15. more than two, but less than many
  7. 16. the line that separates two countries
  8. 17. completely changed from liquid to solid
  9. 18. a group of people with similar physical traits, especially skin color
Down
  1. 1. to demonstrate using evidence
  2. 2. a place that receives very little rain
  3. 3. to ask if someone wants something
  4. 6. how hot or cold something is
  5. 7. an official worker, especially in the military or police
  6. 8. to make warmer
  7. 9. strange, weird, not normal
  8. 10. extreme or very difficult
  9. 13. a unit used to measure temperature
  10. 15. the area that covers Eastern Russia