Earthquake Crossword Puzzle

1234567
Across
  1. 2. When two plates move TOWARD each other
  2. 3. When two plates move AWAY from each other
  3. 5. This is the scale scientists use to measure the strength of an earthquake
  4. 7. A scientific theory that explains how plates making up Earth's crust move
Down
  1. 1. This equipment measures the strength of an earthquake
  2. 4. This natural disaster can also initiate an earthquake
  3. 6. The sudden and sometimes violent shaking of the Earth