My homework

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Across
  1. 2. Hypothesis
  2. 4. materials that carry a charge
  3. 6. trying out
  4. 9. used in experiments
  5. 10. Protective barriers
  6. 11. changes
Down
  1. 1. put together during ongoing work
  2. 3. negative particles
  3. 5. Response
  4. 7. thin metal strands
  5. 8. powered by electricity