SPELLING!

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Across
  1. 4. The period a king or queen rules (5)
  2. 6. A place where books are kept (7)
  3. 7. You measure this on a scale (6)
  4. 10. A scientific test (10)
Down
  1. 1. Organ that pumps blood (5)
  2. 2. Something you like best (9)
  3. 3. To explain in words (8)
  4. 5. Someone who shows the way (5)
  5. 8. The study of past events in school (7)
  6. 9. The second month of the year