Fun with words

12345678
Across
  1. 3. Something that you take when you are ill.
  2. 4. A book that you show when you enter or leave a country.
  3. 7. We need this to make electrical appliances work.
  4. 8. Someone who does a job willingly without being paid.
Down
  1. 1. A method to produce coloured design on a cloth by dyeing it or putting wax on it.
  2. 2. A scientific instrument that makes extremely small things look larger.
  3. 5. A system of tracks on which trains run.
  4. 6. Connected with the sun.