Science

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Across
  1. 3. an explanation of observations
  2. 5. Handle these substances with care
  3. 8. The study of light, sound etc
  4. 10. These substances can cause chemical burns
  5. 11. These substances can easily catch fire
  6. 12. The study of living things
Down
  1. 1. Elements, atoms
  2. 2. a safety symbol shown by a skull
  3. 4. What happens if these substances are ignited
  4. 6. educated guess
  5. 7. These substances produce heat
  6. 9. glass for eye protection