The digraph /si/ making the 'zh' sound

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Across
  1. 4. The ability of two different things to stick together, like glue on paper.
  2. 9. A type of deep underground water well where water flows up naturally.
  3. 10. When a doctor moves blood from one person into another person's body.
  4. 11. A trick that fools your eyes into seeing something that isn't really there.
  5. 12. Going somewhere you are not supposed to be or disrupting others.
  6. 15. When an army enters another country by force.
  7. 17. Going over your schoolwork or notes to study for a test.
  8. 18. Making up your mind or choosing between two things.
Down
  1. 1. The biggest continent on Earth, where countries like China and India are.
  2. 2. Relating to the region that includes Australia, New Zealand, and nearby islands.
  3. 3. When two things crash or run into each other.
  4. 5. When something happens only once in a while, not all the time.
  5. 6. A specific style or form of something, like a newer model of a game.
  6. 7. The very end of a story or a report.
  7. 8. Your ability to see with your eyes.
  8. 13. A screen in your living room used to watch cartoons and movies.
  9. 14. A type of math where you split a big number into equal smaller groups.
  10. 16. When wind or water slowly wears away rocks and soil over time.