unit 1 crossword

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Across
  1. 5. space and mass around us
  2. 7. commercial firm in agriculture
  3. 8. basic science of plants and animals
Down
  1. 1. to grow in water
  2. 2. electronics and ultramodern equipment
  3. 3. can replace itself
  4. 4. grown without chemical pesticides
  5. 6. characteristics of elements