Electricity and circuit

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Across
  1. 4. 2 _____ of the cell marked as + and -
  2. 5. produce current
  3. 6. materials that do not allow current to pass through them
Down
  1. 1. through which current flows
  2. 2. thin wires which glows in bulb
  3. 3. materials that allow current to pass through them
  4. 6. when circuit allows current to pass through then is called ___