Chapter 21 Crossword

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Across
  1. 2. Allowing liquids and/or gases to pass through or penetrate
  2. 5. Type of plastic in which two or more basic units of molecules combined to make one material
  3. 8. Atom or compound that has lost one or more electrons
  4. 10. Cold food preservative method in which food is exposed to high-energy electromagnetic waves
  5. 12. Type of ROP that involves a one-time flushing of a food container with a gas before the container is sealed
  6. 13. Plastic held together with ionic instead of covalent bonds
  7. 18. Type of ROP packaging that uses barriers to control and maintain the desired gases around food
  8. 19. Specially processed cellulose used as a packaging film
  9. 20. Altering of genetic material by adding, removing, or rearranging genes using modern molecular biology
Down
  1. 1. Packaging material made of fused layers of various substances
  2. 3. Packaging that provides an atmosphere with little or no oxygen enclosed with the food
  3. 4. Compound that removes substances harmful to food products from the package environment
  4. 6. Unit of measurement equal to 1,000 grays
  5. 7. Radiation absorbed dose. Basic unit used to measure radiant energy; the amount of ionizing energy absorbed per gram of material
  6. 9. Understanding and control of matter at dimensions of roughly 1 to 100 nanometers
  7. 11. Organism whose genes are altered during the GE or GM process
  8. 14. Chemical compound produced in food as a result of irradiation
  9. 15. Process of altering organisms or any part of these organisms to create new or improved products
  10. 16. Unit of measurement equal to 100 rads
  11. 17. Term describing a completely sealed container used to package foods that require a controlled environment