Fun with magnets

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Across
  1. 2. ATM and credit cards where information is stored in magnetic------
  2. 3. ----- were first used as conpasses for showing directions.
  3. 4. which is natural magnet
  4. 5. magnetic effect can pass through-------'
  5. 6. opposites of two poles --------one another
  6. 9. the first magnet --------
Down
  1. 1. a ---- magnets needs only one keeper across its poles
  2. 3. the force that the magnet exerts on iron is called -------
  3. 7. a magnet always has -------- polez
  4. 8. similar poles of two magnets ------- one another