Digging up the past Crossword

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Across
  1. 1. What it means for something to be underground.
  2. 3. A machine that beeps if it finds something metal.
  3. 4. What’s left of old bodies or ancient objects.
  4. 7. A person who learns about the past by digging things up.
  5. 9. To protect something so it doesn’t rot away.
Down
  1. 2. Something at the bottom of a river, lake, or ocean.
  2. 4. Old or abandoned buildings, or parts of buildings.
  3. 5. A pointed tool archaeologists use for digging.
  4. 6. Soft dirt.
  5. 8. A place where an important person is buried.