Science crossword

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Across
  1. 3. the science of life
  2. 4. another word for 'pollution'
  3. 7. a verb which means 'break' when talking about a computer
  4. 9. a substance which has an effect on the body
  5. 10. the science of chemicals
Down
  1. 1. the science which studies matter, movement and energy
  2. 2. a medicine used to treat headaches
  3. 5. medicines used to prevent infection
  4. 6. when the body is invaded by disease-causing microorganisms
  5. 8. the science of treating illness and disease