Will mountains last forever?

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Across
  1. 2. the process of breaking rocks into smaller pieces
  2. 3. when a liquid turns to solid, like when liquid water freezes to solid ice
  3. 5. a process where a root growing causes rock to break apart
  4. 9. a high area of land with very steep sides
  5. 10. a test used to discover new information about a question
Down
  1. 1. a process where water freezing and expanding causes rock to break
  2. 4. when tiny bits of rock are moved from one location to another by
  3. 6. too big, small, or complicated to work with
  4. 7. wind, ice, or gravity
  5. 8. a pretend version of something that scientists use when the real thing