science words

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Across
  1. 3. a substance that can donate
  2. 4. the process by which living oganisms
  3. 7. the study of anim
  4. 8. the basic structural and functional unit of
Down
  1. 1. peroxide
  2. 2. burner
  3. 5. the study of matter,energy
  4. 6. the interaction between electricity