Challenge Words Letter O

Name: ______________________   Date: ____________

Use the clues to fill in the crossword.

Across

  1. 1. Rounded at the apex (6)
  2. 2. Gas in the air that we need to breathe (6)
  3. 4. A possibility due to a favorable combination of circumstances (11)
  4. 5. An event that occurs at a critical time (8)
  5. 6. Someone who administers the rules of a game or sport (8)

Down

  1. 1. Dutifully complying with the commands or instructions of those in authority (8)
  2. 3. Expecting the best in this best of all possible worlds (10)
  3. 4. A system considered analogous in structure or function to a living body (8)